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Correlations between resting hemodynamics and exercise tolerance before and after prazosin therapy in patients with chronic congestive heart failure Takeshi Ogawa 1 , Tatsuhiko Sekiguchi 1 , Masanori Ishii 1 , Yasuro Sugishita 1 , Iwao Ito 1 1Department of Internal Medicine, Institute of Clinical Medicine, The University of Tsukuba pp.171-177
Published Date 1985/2/15
DOI https://doi.org/10.11477/mf.1404204597
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Measurements of resting supine hemodynamics and exercise tolerance (ET) using treadmill were made before and after prazosin (PZ) therapy of 2 weeks in 27 patients with chronic congestive heart failure (CHF), to evaluate the effects of PZ on hemodynamics and ET and to analyze their cor-relations. Patients were divided into two groups, responders (R group) who showed a marked im-provement in ET after PZ and non-responders (N-R group) who did not.

Although there was no significant difference in ET between two groups before PZ, cardiac index (CI) was significantly lower (p<0.05) and systemic vascular resistance (SVR) was higher (p<0.05) in R group than in N-R group. Thus, there seems to be no close correlation between resting supine hemodynamics and ET. After PZ, CI was signifi-cantly lower (p<0.05) and SVR was higher, although not statistically significant, in R group than in N-R group. In addition, CI was lower than normal range and SVR showed upper value of normal range in R group. These results indicate that patients with more severe CHF show a marked compensatory increase in SVR and more likely reveal an improvement in ET after PZ, despite lower value for CI.


Copyright © 1985, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院

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