Clinical and Cardiodynamic Effects of Adrenocortical Steroids in Congestive Heart Failure

 
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Clinical and Cardiodynamic Effects of Adrenocortical Steroids in Congestive Heart Failure
Clinical and Cardiodynamic Effects of Adrenocortical
              Steroids in Congestive Heart Failure
                     By   MURRAY    A. GREENE, AI.D., ARTHUR GORDON, AI.D.,                  AND
                                        ADOLPH J. BOLTAX, AI.D.

T HE TENDENCY of adrenocortical ste-                           A steady clinical state of at least 5 to 7 days' dura-
     roids and corticotrophin (ACTH) to                        tion was required as a control period prior to
promote salt and water retention, resulting                    physiologic testing. This state was maintained by
                                                               the usual therapy for congestive heart failure and
in an inereased extracellular fluid volume, has                included a standard lowv-salt diet (less than 2 to 3
been established by many investigators.1-'                     Gm. of sodium ehloride daily). Mercurial diuretics
Studies have also demonstrated the impor-                      were not given during this control period although
tance of excessive activity of the adrenal cor-                most patients had received this therapy during the
tex in the pathogenesis of fluid retention and                 course of their previous illness.
edema formation in various disease states,                        During the control period, routine clinical ob-
                                                               servations were made and pertinent laboratory data
including heart failure.6      In contrast, so-                obtained. Radioiodine uptakes by the thyroid
dium and water diuresis and an improved re-                    gland were measured in order to evaluate the pos-
sponse to mercurial diuretics, accompanied by                  sibility that depression of thyroid function by
clinical improvement, were reported in some                    steroids may secondarily affect clinical states and
patients with congestive heart failure during                  cardiodynaiies. Phenolsulfonphthalein excretions
                                                               and urea clearances were measured as gross indices
or following the administration of cortico-                    of renal function. Fluid balances were evaluated
steroids and ACTH.12-19 The need to eluci-                     according to daily fasting weights, daily urine out-
date the problem of the effects of these agents                puts, and frequent determinations of serum and
in heart failure and the role of adrenal corti-                urine electrolytes.
coids in the formation of edema are the basis                     Physiologic studies of cardiovascular hemody-
for the present study of the effects of corti-                 namics by the standard technic of right heart
                                                               catheterization were then performed (tables 2A
costeroids upon the clinical status, electrolyte               and 2B). The patients were in the resting recum-
balances, and cardiovascular dynamics in a                     bent positions and were not given premedication.
group of subjects having heart disease of                      Duplicate measurements of cardiac output (direct
varied etiologies and congestive failure of                    Fick) were made. Pressures were obtained with the
varying severity.                                              use of Statham strain-gage transducers (P23A)
                                                               and recorded on a multichannel oscillographic pho-
              Materials and Methods                            tographic recorder. Mean pressures were obtained
   Nine patients, 4 female and 5 male, with con-               by electrical integration of the pressure pulses.
gestive heart failure are the subjects of this study           Since flow and pressure miieasuremiients did not vary
(table 1). Ages ranged from 17 to 65 vears. The                significantly during single studies, olnly average
patients are further classified according to etiology,         values are tabulated. Total pulmonary vascular,
functional capacity (New York Heart Associa-                   pulmonary "arteriolar," and total peripheral arte-
tion), and clinical status in table 1. Varied etiolo-          rial resistances were calculated according to stand-
gies and mild to severe degrees of heart failure               ard formulas (Poiseuille). Resistance is expressed
are represented.                                               as dynes see. ci.-5 by the use of conversion fac-
  The patients were hospitalized throughout the                tors.: Total plasma volumiies were determined by
study and were semi-aimbulatory or restricted to               the I131-labeled human serum albumin method
bed rest according to their functional capacities.             and converted to total blood volumes by the use
                                                               of peripheral hematocrit values. Predicted plasma
  From the Department of       MIedicine,   The Bronx          volumes for either sex were based on the studies
Hospital, New York, N. Y.                                      of Samet et al.20 These values are essentially simi-
  Supported in part by a grant from The John                   lar to those reported by other investigators. Pul-
Polachek Foundation for Medical Research and in
part by a grant (H-4344) from the National Insti-                *1,332   =   conversion factor   fronm mmn. Hg to clynes
tutes of Health, U. S. Public Health Service.                  cm.4
Circulation, Volume XXI, May 1960                        661

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662                                                                                                                                                                                             GREENE, GORDON, BOLTAX

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                                                                                                                                                                                                                Circulation, Volume XXI, May 1960

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STEROIDS IN CONGESTIVE FAILURE                                                                               663

monary vital capacities and maximum breathing              analyzed. In each of these studies at least 2 con-
capacities were obtained the day prior to cathe-           trol "resting" cardiac output deternminations (direct
terization with the modified Benedict-Roth spirom-         Fick), multiple pressure measurements, and resist-
eter.                                                      ance calculations were performed at intervals of
   After the control clinical and physiologic studies      22 to 143 nminutes (average 41 minutes), while the
were completed, adrenocortical steroids were ad-           patients' states were considered to be constant.
ministered for 13 to 16 days (table 1). Six pa-            Chance or expected variations in terms of 95 per
tients received prednisone and 3 received triameino-       cent confidence limits (2 standard deviations from
lone." These agents were selected because of their         the mean variation) were established on this basis
diminished tendency to cause soduim and water              for the various measures of cardiovascular hemo-
retention, edema, and potassium depletion as com-          dynamics. A wide range of abnormalities in cardio-
pared to other agents.21-25 None of the other usual        dynamics was present in this control group, as
contraindications to steroid therapy was present.          would be expected in any series of patients with
    Clinical status, routine laboratory data, and fluid    heart disease and congestive failure. It was there-
balances were evaluated throughout the phase of            fore thought that greater reliability in an evalua-
steroid therapy. Radioiodine uptakes by the thy-           tion of the results would exist if these confidence
roid gland were measured prior to repeat cardiac           limits were expressed in terms of percentage varia-
 catheterization. The previously stabilized cardiac        tions rather than changes in absolute values. Two
 regimen was continued during this period. Mer-            exceptions are pulmonary "wedge" and right ven-
 curial diuretics were given whenever warranted by         tricular end-diastolic pressures. These parameters
 the development of appreciable aggravation of elin-        are expressed in terms of absolute changes because
 ical heart failure. Supplementary potassium ther-          only mininmal variations usually occur during a
 apy was not given.                                         ''resting" state and because small variations in
    Right heart catheterization and blood volume            their usually low num-lerical values frequently re-
 determinations were then performed on the last             sult in inordinately high percentage changes.
 day of steroid administration; vital capacities and           Changes in cardiovascular dynamics in the pres-
 maximum breathing capacities were determined on            ent series of 9 patients who received steroids were
 the day prior to catheterization (tables 2A and            then evaluated in terms of statistical significance
 2B).                                                       at the 5-per cent level. Changes that are consid-
    Clinical status and fluid balances were observed        ered to be statistically significant are appropriately
 in some patients for several days following steroid        indicated in tables 2A and 2B. It is appreciated
 withdrawal.                                                that appraisals of the 2 sets of data in these sub-
    Changes in cardiovascular hemodynamics as a             jects may not be strictly comiiparable with those of
 result of drug administration were evaluated in            the control group because of the differences in time
 terms of statistical probabilities. In order to de-        intervals. The possibility of greater variations in
 termine whether these changes may have been due            "resting" states may exist when studies are sep-
 to chance variation, or due to the action of an            arated by greater time intervals. This factor does
 introduced variable (steroids in this study), 29           not appear to represent a major difficulty, how-
  consecutive right heart catheterizations in this lab-     ever, since miietabolic states could be studied and
  oratory in adults with varied types of heart disease      compared on the basis of oxygen consumptions
  and with varying degrees of conlgestive failure were       and respiratory quotients.
   **The authors wish to thank The Squibb Institute                             Results
 for Medical Researeh, New Jersey, for their supply            Three types of responses to steroid adminis-
 of triameinolone, (Kenaeort ®).                             tration occurred in this series of patients:
             *S. Tinie periods are denoted in this column. I, control observation period prior to initial
          physiologic studies; II, during the period of steroid administration (maximal changes and
          their time of occurrence are indicated); III, immediately prior to the repeat physiologic
          studies.
             tDyspilea. Severe if at rest, moderate if during mild effort, and slight if only during
          moderate effort.
             +Edema. Marked if involving more than lower extremities (presacral, abdominal wall),
          slight, if involving ankles.
             AI, aortic insufficiency; AS, aortic stenosis; CHF, congestive heart failure; CP, cor pul-
          monale; E, emphysema; HHD, hypertensive heart disease; IMH, idiopathic myocardial hyper-
          trophy; MI, mitral insufficiency; MS, mitral stenosis; PF, pulmonary fibrosis; RHD, rheu-
          inatic heart disease.
 Circulation, Volume XXI, May 1960

                     Downloaded from http://circ.ahajournals.org/ by guest on November 4, 2015
664                                                                                                                                                    G(REENE G(RD()N, BOL'TAX

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STEROIDS IN CONGESTIVE FAIIURE                                                                                                                                                                                                                       665

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                                   Downloaded from http://circ.ahajournals.org/ by guest on November 4, 2015
666                                                                     GREENE, GORDON, BOLTAX
Increases in congestive heart failure (5 pa-              few statistically significant changes in cardio-
tients), no significant changes in clinical states        dynamics occurred (tables 2A and 2B). This
(3 patients), and improvement in clinical                 lack of change could be attributed to the ap-
state and in cardiodynamics (1 patient).                  preciable neutralization of the clinically ob-
Increases in Congestive Heart Failure                     vious detrimental effects of steroids by mer-
                                                          curial therapy, which was administered until
    Clinical heart failure increased in severity
 in 5 (cases 1 to 5) of the 9 patients during             clinical improvement was obtained.
 steroid therapy (table 1). In 4 of these pa-                Total plasma volumes were elevated ini-
 tients (cases 1 to 4) slight to mnoderate reduc-         tially in all 5 patients, but they did not change
 tions in daily urine volumes occurred concomi-           much after steroid therapy. Slight falls in
 tant with increases in weight, indicating posi-          plasma volumes in 3 patients may well have
 tive fluid balances. Laboratory data suggest-            resulted froni mercurial diuretics used to com-
 ed worsening of hepatic function (increased              bat congestive failure. No significant changes
bromsulfalein retention) and renal function               in vital capacities and maximum breathing
 (increased blood urea nitrogen and decreased             capacities occurred as a result of steroid ad-
 urea clearance) in some patients of this group.          ministration. In 3 patients (cases 1 to 3) in
All initially had normal 24-hour radioiodine              whom fluid balances were measured for sev-
uptakes (thyroid); no changes occurred dur-               eral days following steroid withdrawal, no
ing steroid therapy. Parenteral mercurial                 significant changes occurred in weights, urine
diuretics were given to 4 patients (cases 2 to            volumes, and urinary excretions of elec-
 5) because it was considered hazardous to per-           trolytes.
muit the deteriorated clinical conditions to per-         No Significant Changes in Clinical States
sist. Responses to this therapy were poor.                  In 3 patients (cases 6 to 8) no changes in
   Hyponatremia and hypochloremia existed                clinical heart failure occurred during steroicd
in 2 patients in the control period, slight in           administration (table 1). A weight loss of 5
one (case 1) and marked in the other (case 3).           pounds was noted in 1 patient (case 8). Mark-
During steroid therapy slight depression of              ed anorexia and diminished food intake as
serum sodium occurred in 2 patients (cases               well as a decline in urine output and in uiin-
1 and 4) and of serum chloride in 2 (cases I             ary sodium and chloride exeretions suggested
and 3). In all 5 patients daily urine sodium             that this weight loss was due to a decrease
and chloride exeretions were markedly de-                in tissue mass rather than to a diuretic re-
pressed in the control period. During steroid            sponse. No changes occurred in laboratory
therapy excretion of these ions did not change           data or in 24-hour radioiodine uptake by the
or decreased slightly in 4 patients, whereas             thyroid gland. In 2 patients (cases 6 and 7)
ani increase occurred in 1 (case 2).                     control 24-hour urine sodium and chloride
   At the time of the second physiologic                 exeretiolis were within normal limits; in the
studies, 1 patient (case 1) who did not re-              other patient excretions of these ions were
ceive mercurials had a weight gain of 6                  dimninished. Moderate reductions in daily so-
pounds and considerable increase in heart                dium and chloride excretions occurred in
failure, and another (case 2) was somewhat               these 3 patients during steroid administration.
improved by mercurial therapy but was still                No significant changes in cardiodynamics
worse than his control state as well as 2                occurred as a result of corticosteroid adminis-
pounds heavier. The others had resumed their             tration except for a decrease in right ventricu-
control clinical states after mercurial therapy          lar end-diastolic pressure and pulnionary
although 2 (cases 3 and 5) were 2 and 4                  "arteriolar'" resistanee in 1 patielnt (case 7)
pounds lighter.                                          (tables 2A and 2B).
   In 1 patient (case 3) the second catheteri-             Total plasma volumes were elevated initial-
zation was unsuccessful. In the others very              ly in all 3 patients. In 2 (eases 6 and 7)
                                                                              Circulation, Volume XXI, May 1960

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STEROIDS IN CONGESTIVE FAILURE                                                                         667

slight to moderate decreases occurred during                                    Discussion
steroid therapy; in 1 (case 8) a moderate                     The effects of ACTH and adrenal cortical
increase occurred.                                         steroids upon renal and cardiovascular sys-
  No significant changes in vital capacities               tems in man and experimental animals have
and maximum breathing capacities occurred                  been far from uniform, so that generaliza-
as a result of steroid therapy. In 2 patients              tion about the specific activities of these hor-
(cases 6 and 8) in whom fluid balances were                inones is most difficult. The tendency of these
studied for several days following steroid                 hormones to promote salt and water retention
withdrawal, no changes occurred in body                    and, consequently, an increase in extracellu-
weights, urine volumes, and urine electrolyte              lar fluid volume has been observed by many
excretions.                                                investigators.1-5, 26 Corticoids that have prom-
Improvement in Clinical State and in Cardiody-             inent actions of this type include desoxy-
namics                                                     corticosterone, cortisone, hydrocortisone, and
   In the patient (case 9) with pulmonary                  aldosterone. Newer synthetic derivatives
fibrosis and emphysema and cor pulmonale                   have distinctly less tendency to cause salt
as the basic disease, there was an improve-                and water retention although positive fluid
ment in dyspnea during steroid therapy (table              balance has been observed, especially with
1). However, a weight gain of 4 to 5 pounds                higher dosages.2' 25 In contrast, some studies
and a slight decrease in daily urine output                demonstrate that these hormones may possess
occurred concomitantly. There were no                      diuretic properties. Davis and Howell27 ob-
changes in routine laboratory data or in radio-            served that both ACTH and cortisone pro-
iodine uptake by the thyroid gland. A slight               duced an initial loss of salt and water in the
fall in serum chloride occurred.                           intact dog. Other authors have reported
   Improvement in cardiodynamics resulted                  natriuresis and chloruresis during the ad-
                                                           ministration of ACTH in man28 and in the
from administration of corticoids (tables 2A               rat.29 Gaunt, Birnie, and Eversole30 cited
and 2B). There were a significant increase
in cardiac output and lowered pulmonary                    experimental data indicating that cortical
artery systolic and mean pressures and right
                                                           hormones may produce diuresis in animals
ventricular end-diastolic pressure. Although               with normal water balance, in overhydrated
these changes in pressures may have been due               ones, and even in mildly dehydrated ones.
to corresponding changes in intrathoracie                     In view of this diversity of steroid actions,
pressure (which was not measured), the simi-               it is not difficult to understand the uncer-
larity of pulmonary "wedge" pressures in                   tainties regarding clinical applicabilities of
both studies suggests that the decreases in                these hormones in patients with diseases char-
pulmoonary artery and right ventricular pres-              acterized by positive fluid balanees, particu-
sures were due to decreases in effective intra-            larly congestive heart failure. This difficulty
vascular pressures. Pulmonary vascular and                 is further compounded by studies that have
pulmonary "arteriolar" resistances also de-                demnonstrated increased activity of endogenous
creased significantly. Qxygen consumption                  salt-retaining adrenal cortical hormone, aldo-
was higher during the second study and may                 sterone, in these diseases.7       31-33 In
                                                                                                    T gen-
have indicated some change in metabolic state.             eral corticoids have been used with caution
Nevertheless, the data indicate improvement                in these conditions because of their tendeney
in dynamics. Total plasma volume increased                 to promote salt and water retention. Vari-
slightly with steroid therapy. Minimal, if                 ous investigators, however, have reported fav-
any, improvement in vital capacity and maxi-               orable results following the administration of
mum breathing capacity occurred.                           these hormones to patients with congestive
   No changes in fluid balance occurred fol-               heart failure.12-19 Results, however, were not
lowing steroid withdrawal.                                 uniform in all studies. Some patients had
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668                                                                     GREENE, GORDON, BOLTAX

cliniical and hemodynamic deterioration prob-             improved durinig steroid therapy. This was
ably due to renal retentioni of salt an-d water.12        the only subject who had pulmonary fibrosis
In another study'8 a small number of pa-                  and emphysema with cor pulmionale. This
tients demonstrated decreased urinary sodiuim             patienlt had imnprovement in cardiodylnamicis
excretion, inerease in weight, and possibly               despite a positive fluid balanee. It wouLld
inerease in dyspnea.                                      be difficult in this case to define the primary
   The present study was undertaken to eluci-             mode of action of the steroid frolm the limit-
date the effects of adrenal cortieoids in conl-           ed amount of data available concerniing pri-
gestive heart failure. In the 5 of the 9 pa-              marv pulmoinary functions. Possibilities in-
tients in this series subjective anid objective           elude improvemieint in pulmonary iniflamma-
clinical manifestations and laboratory data               tion, bronelhomotor tone, anid vascular resis-
indicated positive fluid balalnces with increas-          tance, causilng a decline in right heart work
ed fluid accumulationi anid inereased cardiac             load and, conisequently, improvement in right
deeompensation during the phase of steroid                heart function. Other workers have described
therapy. Respolnses to mnercurial diuretics               favorable clinical results and improvenments
were poor. Heightened responsiveness dur-                 in pulmaonarv function following corticoster-
ing steroid therapy was lnot observed in any              oid therapy in patients with chronic pul-
patient in this study. An evaluation of                   muonarv disease.34 This ease is of initerest
cardiodynamic changes is more difficult be-               in that clinical an-d hemodyniamie improve-
cause of the effects of additional diuretie               mnent occurred onlv in that patient who did
measures given to 4 patients during steroid               not have uncomitplicated heart failure. Fac-
therapy. These agents were givenl because of              tors were probably presenit that are kniowln to
the development of precarious clinical condi-             be favorably affected by corticosteroids, e.g.,
tions. It is therefore not surprising that 11o            iniflammnatioin, and so forth. It is also prob-
significant changes in cardiodynamics and                 able that the additional fluid retained was
some decreases in plasma volunmes were noted              distributed throughout the body compart-
in those patients given miiercurial diuretics             menets and any7 inierease in fluid that miight
until clinical improvement occurred. In 1 pa-             have occurred in the right heart was nmore
tient (case 2) who was clinically worse and               than compensated bv the favorable primary
had an inerease in plasma volume (in spite of             effect on the cardiopulmonary systeuis.
2 mercurial injections) at the time of the                   It is difficult to delineate those factors that
second cardiac catheterizationi significant in-           may favor fluid retention during steroid
creases occurred in pulmoonary artery anId                therapy in some patients anid not in others.
right ventricular end-diastolic pressures.                The patienits whose heart failure inereased
   In 3 of the remaining 4 patients no changes            were those who gelnerally seemed to haave
in cliniical status occurred durinig steroid              greater degrees of decompensation character-
therapy. Somue diminution in urinary sodium               ized bv severe subjective maniifestations, co'n-
and chloride excretions occurred in these pa-             siderable fluid accumnulationi, alnd marked de-
tients although the depressioln present in the            pressionis in sodium. anid chloride exeretions.
first group was nlot observed. One patient                Comparisoln of cardiovascular dyianmics be-
 (case 8) had a reduction in circulating volumne          tween the first 2 groups reveals much overlap-
and a deeline in right venitricular elnd-diastolic        ping in many of the mneasurements. However.
pressure. A minimal inerease in daily urin-               the generally higher pulmonary "wedge" and
arv volunme in this patient would not appear              right ventricular enid-diastolie pressures and
to account completely for the diminution in               total plasma volumes in those patients worsen-
eirculatilng volume although it could have con-           ed by steroids suggest that deteriorationi is
tributed to it. Another possibility may be                more likely to be produced in those patients
that of internal fluid shifts.                            who already have conisiderable fluid accumula-
   In 1 patienlt (case 9') eliuiical symptoms             tion. The addition of agents that can retaini
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STEROIDS IN CONGESTIVE FAILURE                                                                        669

salt and water simply increases the severity               cifically antagonize endogenous fluid-retaining
of the existing positive fluid balance.                    factors may prove fruitful in patients with
   It is difficult to explain the differences in           congestive heart failure. The prominent role
results in the present study from those re-                of endogenous adrenocortical hormones (espe-
ported by others, 12-19 in which diuresis and              cially aldosterone) in retaining fluid and in
clinical improvement were noted in many pa-                promoting formation of edema in patients
tients with congestive heart failure. Evalua-              with heart failure has recently been empha-
tion of the effects of prolonged administration            sized. Drugs that may antagonize these hor-
of various drugs in heart failure may be haz-              mones would be most important.38
ardous in view of the spontaneous variations
                                                                              Summary
that may occur in this state. Strict selection
of patient miaterial is also important. Sub-                  This study is concerned with the effects of
jects who are in a steady clinical state are best          adrenocortical steroids in patients with con-
studied; those who have had acute deteriora-               gestive heart failure.
tion in cardiac funetion prior to drug admin-                Nine adults with heart failure were studied
istration may not be satisfactory subjects for             during a steady clinical state (5 to 7 days),
this way suggest variable extralneous adverse              during administration for 13 to 16 days of
factors which by their presence or remittanee              prednisome (6 patients) or triameinolone (3
may influence results. Concomitant therapy                 patients) and in some subjects following ster-
that nmay be detrimental to subjects with heart            oid withdrawal. Daily determinations of
failure should be avoided. One group of in-                fluid balances were made. Standard right
vestigators maintainied high levels of water               heart catheterizations and inieasurements of
intake before anid during steroid administra-              blood volumes were performed prior to and
tion.'5-1' Leiter35 has reviewed data which in-            at the terminiation of therapy.
dicate that subjects with congestive failure                  Three types of responses to steroids oc-
may retain water excessively (resembling the               curred. In 5 patients increases in subjective
effects of excessive antidiuretic hormone),                and objective manifestations of heart failure
 leading to a worseninig of elinical status. Ster-         and increased fluid retention occurred. Four
oids may have prevented overhydration in                   of them developed precarious clinical condi-
these patientsl'5 16 as it does in water intoxi-           tions during steroid therapy, requiring mer-
 cation aiid as an anitagonist to antidiuretic             curial diuretics, but with poor results. In
hormone30' 36, 37 and niav niot have affected              general, cardiodynamie status at the termin-
 any of the originally existing abnormal eardi-
                                                           ation of steroid therapy correlated well with
                                                           clinical status. In 3 patients the clinical
 ovascular-renal hemodvnaniies.
                                                           status did not change. Some depression in
    Patients were selected for the presenit study          urinary sodium and chloride excretions were
who were in a steady clinieal state and who                noted during therapy. Cardiodynamics were
had heart disease of varied etiologies and of              unaltered, except for an unexplained decrease
varying severity and no other condition that               in right ventricular end-diastolic pressure in
 could be favorably affected bv steroids, espe-            1 patient. In 1 patient elinical and cardio-
 cially infectious diseases and overt inflanmma-           dynlamic state improved, despite positive fluid
tory processes. The one exception was the                  balance. This was the only subject with
patient with pulmuonary fibrosis and emphy-                primary lung disease (emphysema) and cor
 sema. The results in this patient demonstrate             pulmonale.
 the need for care in patient selection. The                 These studies suggest that corticosteroids
 phase of drug adminiistration was restricted              are generally detrimental in uncomplicated
 to 13 to 16 days to miinimize the possibility of          congestive heart failure. Greater deteriora-
 spontaneous change in disease states.                     tion appeared in subjects having the more
    Further work with agents that more spe-                severe degrees of decompensation, suggesting
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670                                                                        GREENE, GORDON, BOLTAX
that exogenous fluid-retaininig influences were                                   References
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STEROIDS IN CONGESTIVE FAILURE                                                                                    671

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Circulation, Volume XXI, May   1960

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Clinical and Cardiodynamic Effects of Adrenocortical: Steroids in Congestive
                               Heart Failure
     MURRAY A. GREENE, ARTHUR GORDON and ADOLPH J. BOLTAX

                                  Circulation. 1960;21:661-671
                                  doi: 10.1161/01.CIR.21.5.661
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