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Previous Volume 303:1443-1448 December 18, 1980 Number 25 Next

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Abstract

To clarify the controversy regarding the benefits of long-term oral digoxin in the treatment of heart failure, we evaluated hemodynamics at rest and during exercise in nine patients in sinus rhythm with symptomatic heart failure. Patients were studied during long-term digoxin therapy, after withdrawal of the drug, and six hours after readministration. Upon withdrawal of digoxin, pulmonary capillary-wedge pressure increased from 21 +/- 8 to 29 +/- 10 mm Hg, and cardiac index decreased from 2.4 +/- 0.7 to 2.1 +/- 0.6 liters per minute per square meter of body-surface area, suggesting a deterioration in left ventricular function. In addition, heart rate tended to increase and stroke-work index, stroke-volume index, and radioangiographic ejection fraction decreased. Acute readministration restored the hemodynamic values to those observed during long-term digoxin therapy. The improvement in hemodynamics during long-term digoxin administration was also observed during exercise. This improvement demonstrated the value of long-term oral digoxin therapy in congestive heart failure.

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