A polygraphic study of systolic time intervals and their correlations with heart rate and workload during supine ergometry in one hundred normal subjects

Renato Martinotti, Francesco Sardella, Marco Pastori, Valter Monzani, Antonio Randazzo

Research output: Contribution to journalArticle

Abstract

The present study was designed to investigate systolic time intervals (STI) in 100 normal subjects undergoing continuous-maximal supine cycle ergometry and to search for possible linear correlations between STI (dependent variables) and heart rate, diastolic blood pressure, systolic blood pressure, age, sex, weight, and height (independent variables), by stepwise regression analysis. The only significant correlation discovered in the study was between the contractility index (isometric contraction time ICT) and the total work produced by each participant. Exercise tolerance was limited primarily by shortening of the ICT interval, all subjects discontinuing the test when ICT reached 13.7 ± 7 ms.

Original languageEnglish
Pages (from-to)133-144
Number of pages12
JournalCardiology
Volume75
Issue number2
DOIs
Publication statusPublished - 1988

Keywords

  • Isometric contraction time
  • Supine exercise test
  • Systolic time intervals

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Pharmacology (medical)

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