Abstract
HD of 111 hypertensive (H) high school students and their response to exercise were determined by non-invasive techniques and compared with 67 normotensive (N). Left ventricular ejection time (LVET) and pre-ejection period (PEP) were determined from simultaneously recorded electrocardiogram (ECG), phonocardiogram and external carotid pulse tracings, cardiac index (CI), ejection fraction (EF), mean velocity of circumferential fiber shortening (Vcf) and percent shortening of internal diameter (SID) of the left ventricle were measured by echocardiography. Exercise was performed on a bicycle ergometer against 3 work loads ending with a 10 minute rest period. Heart rate (HR) and blood pressure (BP) were monitored during and after the exercise. ECG-VCG showed mild left ventricular hypertrophy in 40% of male H and 19% of female H. PEP was significantly shortened, PEP/LVET decreased in H when compared with N. CI was lower and EF, Vcf and SID higher in the H. The peak HR and BP during exercise in H were significantly higher and their return to baseline levels slower than N. The HD response to exercise was not significantly different between H and N. This study suggested that young H have an identifiable hemodynamic profile.
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Hernandez, A., Goldring, D., Choi, S. et al. HEMODYNAMIC (HD) FEATURES OF HYPERTENSION AMONG HIGH SCHOOL STUDENTS. Pediatr Res 11, 372 (1977). https://doi.org/10.1203/00006450-197704000-00016
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DOI: https://doi.org/10.1203/00006450-197704000-00016