Internal Medicine
Online ISSN : 1349-7235
Print ISSN : 0918-2918
ISSN-L : 0918-2918
Deterioration of Congestive Heart Failure after Converting to VOO Mode from DDD Mode in a Dilated Cardiomyopathy Patient; Importance of Atrial Contribution
Kanji IGAKenjiro HORITadashi MATSUMURAHiromitsu GEN
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1993 Volume 32 Issue 6 Pages 459-461


We describe a 62-year-old dilated cardiomyopathy patient in whom congestive heart failure progressed shortly after DDD mode was changed to VOO mode because of battery exhaustion. Emergency battery exchange with restoration of DDD mode improved his functional status to the previous level; pulmonary capillary wedge pressure decreased from 28 to 24 mmHg and cardiac output increased from 1.5 to 2.0 L/min associated with widening of the aortic pulse pressure. Maintenance of atrial contraction is therefore important even if left ventricular systolic function is markedly impaired and left ventricular end-diastolic pressure is increased.
(Internal Medicine 32: 459-461, 1993)

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