The effects of age and blood pressure upon the systolic time intervals in males aged 20-89 years

D. J. Shaw, D. A. Rothbaum, C. S. Angell, N. W. Shock

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of age, activity status, and blood pressure on systolic time intervals (STI), including electromechanical systole (QS2), left ventricular ejection time (LVET), pre ejection period (PEP), and their heart rate corrected indices, QS21, LEVTI, and PEPI, were analyzed in 315 male subjects aged 20-89 yr. An elevated diastolic blood pressure (≥ 90 mm Hg) was significantly correlated with prolongation of the PEP, PEPI and QS21. An elevated systolic blood pressure (≥ 140 mm Hg) was significantly correlated with prolongation of the LVET, LVETI, QS2, and QS21. Neither coronary heart disease, functional Class 1 (67 subjects), nor estimated daily physical activity (range 1623-5752 cal/24 hr) were significantly related to STI. In 218 healthy normotensive subjects, a significant but small prolongation of the PEP and PEPI (4 msec/decade) and QS21 (5 msec/decade) was found from the 3rd through the 6th decade with a decline in these intervals in the 7th and 8th decades.

Original languageEnglish (US)
Pages (from-to)133-139
Number of pages7
JournalJournals of Gerontology
Volume28
Issue number2
DOIs
StatePublished - Jan 1 1973

ASJC Scopus subject areas

  • Aging

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