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Titolo:
INFLUENCE OF PRIOR EXERCISE ON STROKE VOLUME TO PULSE PRESSURE RATIO IN YOUNG SUBJECTS WITH HYPERTENSION OR DILATED CARDIOMYOPATHY
Autore:
RAHMAN MA; HARA K; FLORAS JS;
Indirizzi:
MT SINAI HOSP,DIV CARDIOL,STE 1614,600 UNIV AVE TORONTO ON M5G 1X5 CANADA TORONTO GEN HOSP,DIV CARDIOL TORONTO ON M5G 2C4 CANADA TORONTO GEN HOSP,CARDIOVASC RES CTR TORONTO ON M5G 2C4 CANADA UNIV TORONTO TORONTO ON M5G 2C4 CANADA
Titolo Testata:
Canadian journal of physiology and pharmacology
fascicolo: 10-11, volume: 75, anno: 1997,
pagine: 1232 - 1240
SICI:
0008-4212(1997)75:10-11<1232:IOPEOS>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
NONINVASIVE DOPPLER ULTRASOUND; ISOLATED SYSTOLIC HYPERTENSION; LEFT-VENTRICULAR MASS; AORTIC COMPLIANCE; ARTERIAL DISTENSIBILITY; HUMANS; HEMODYNAMICS; SENSITIVITY; RESISTANCE; STIFFNESS;
Keywords:
ARTERIAL COMPLIANCE; DILATED CARDIOMYOPATHY; EXERCISE; HYPERTENSION; PERIPHERAL CONDUCTANCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
43
Recensione:
Indirizzi per estratti:
Citazione:
M.A. Rahman et al., "INFLUENCE OF PRIOR EXERCISE ON STROKE VOLUME TO PULSE PRESSURE RATIO IN YOUNG SUBJECTS WITH HYPERTENSION OR DILATED CARDIOMYOPATHY", Canadian journal of physiology and pharmacology, 75(10-11), 1997, pp. 1232-1240

Abstract

The objectives of this study were, first, to compare stroke volume tobrachial artery pulse pressure ratios (SV/PP) as noninvasive, indirect estimates of total arterial compliance, in young subjects with primary hypertension or dilated cardiomyopathy and age-matched normal subjects and, second, to determine the influence of prior submaximal exercise on this ratio, and on calf and total peripheral vascular conductance in these subjects. We studied young patients (<40 years old) with primary hypertension (n = 12) or dilated cardiomyopathy (n = 12) and healthy normotensive subjects (n = 12) matched for age and body size. Doppler estimated stroke volume, brachial artery pulse pressure, and calfblood flow were determined during supine rest before and 60 min afterexercise. Normotensive and hypertensive subjects returned 1 month later to determine the reproducibility of the SV/PP value. At rest, the SV/PP value was inversely related to left ventricular mass index (r = -0.55, p < 0.001) and was similar in normotensive and hypertensive subjects, but was significantly lower (p < 0.05) in cardiomyopathy. The SV/PP value was reduced 60 min after exercise in both normotensive (p < 0.05) and hypertensive (p < 0.05) subjects, but not in cardiomyopathy patients. In contrast, total and calf vascular conductance increased after exercise in all three groups. These aftereffects indicate that these estimates of compliance and conductance are dynamic, and can be modulated acutely and independently by exercise.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 18:06:23