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Gender-related differences in left ventricular chamber function.

C S Hayward1, W V Kalnins, R P Kelly

  • 1Department of Cardiology, St Vincent's Hospital, Victoria St, NSW 2010, Darlinghurst, Australia. chayward@stvincents.com.au

Cardiovascular Research
|February 13, 2001
PubMed
Summary
This summary is machine-generated.

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Women exhibit enhanced systolic chamber function and reduced diastolic compliance compared to men, despite similar ventriculo-vascular coupling. These gender-specific cardiac differences persist even after accounting for body size.

Area of Science:

  • Cardiovascular Physiology
  • Gender-based Medicine
  • Cardiac Mechanics

Background:

  • Women have lower rates of atherosclerotic disease but higher rates of cardiac failure post-infarction or surgery.
  • This disparity exists despite women typically having a greater left ventricular (LV) ejection fraction.
  • Gender differences in systolic function and ventriculo-vascular coupling may explain these clinical observations.

Purpose of the Study:

  • To investigate gender-specific differences in left ventricular (LV) systolic chamber function and ventriculo-vascular coupling.
  • To determine if these differences contribute to observed clinical disparities in cardiac outcomes.

Main Methods:

  • Utilized pressure-volume loops from 30 patients (16 women) with normal LV function.
  • Measured end-systolic and end-diastolic pressure-volume relationships (ESPVR, EDPVR) and preload recruitable stroke work (PRSWR).

Related Experiment Videos

  • Analyzed results by gender, adjusting for body size and chamber dimensions.

    • Main Results:

    • Women displayed higher end-systolic blood pressure and smaller LV cavity volumes.
    • Significantly higher LV end-systolic elastance (Ees) and arterial elastance were observed in women.
    • Women had lower passive LV diastolic compliance, but ventriculo-vascular coupling (Ees/Ea ratio) was similar between genders.

    Conclusions:

    • Women exhibit greater systolic chamber function and lower diastolic compliance than men.
    • These gender differences in cardiac mechanics are related to chamber size, not body size.
    • Despite differences in resting ventricular elastance, appropriate ventriculo-vascular coupling is maintained in both genders.