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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1993-4-29
pubmed:abstractText
We studied the correlation between changes in left ventricular filling dynamics induced by acute intravenous administration of verapamil and the changes in exercise tolerance induced by oral administration of the agent in 30 patients with hypertrophic cardiomyopathy. Diastolic cardiac function was measured by means of a nuclear stethoscope before and 10 min after intravenous administration of verapamil, 0.15 mg.kg-1 over 2 min. Treadmill exercise tests using a modified Bruce protocol were performed before the initiation of oral verapamil treatment and after 4 weeks of oral therapy at a dose of 320-360 mg.day-1 (mean +/- SD 332 +/- 17 mg.day-1). Peak filling rate (PFR) increased in 21 patients, 18 of whom (86%) also had an increase in exercise duration, PFR showed no increase in nine patients, eight of whom (89%) had no change in exercise duration (sensitivity 95%, specificity 73%, predictive value of the positive result 86%, predictive value of the negative result 89%). Acute changes in time from the beginning of rapid filling to PFR (t-PFR) and in left ventricular end-diastolic volume (EDV) were less useful in predicting improvement in exercise tolerance. In 19 patients the changes in PFR and EDV paralleled. Twelve of the 13 patients (92%) with an increase in both parameters also had an increase in exercise duration, whereas all six in whom these parameters were reduced showed no increase in exercise duration (sensitivity 100%, specificity 86%, predictive value of positive results 92%, and predictive value of negative results 100%).(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0195-668X
pubmed:author
pubmed:issnType
Print
pubmed:volume
14
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
410-5
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
The acute response of left ventricular filling dynamics to intravenous verapamil predicts the changes in exercise tolerance after oral verapamil therapy in patients with hypertrophic cardiomyopathy.
pubmed:affiliation
Second Department of Cardiology, Silesian Medical Academy, Zabrze, Poland.
pubmed:publicationType
Journal Article