Return to search

The Relationship Between Maximal Aerobic Capacity and Left Ventricular Function with Respect to Age

In this study, the relationship between maximal aerobic capacity (VO₂max) and left ventricular function was examined in two distinct age groups. A young group (20 - 30 years of age) and an elderly group (over 60 years of age) were compared. Left ventricular function was examined over wide variations in preload accomplished by 5º head-down tilt (TILT) for ninety minutes and lower body negative pressure (LBNP) to -40 mm Hg. with two-dimensional echocardiography. A greater response to an increase in preload (TILT) was related to high VO₂max levels in the young subjects but not in the elderly groups of subjects, suggesting that lower VO₂max levels of the elderly population affected the mechanism of response to the increased levels of preload. Additionally, in the elderly, greater reductions in ventricular volume reflected increased peripheral pooling due to decreased venous tone and/or increased venous compliance during LBNP and were related to increased VO₂max. In the young, VO₂max does not appear to affect the response to reduced preload.

Identiferoai:union.ndltd.org:unt.edu/info:ark/67531/metadc663678
Date12 1900
CreatorsPage, Kimberly Ann
ContributorsRaven, Peter Bernard, 1940-, Redden, David R.
PublisherNorth Texas State University
Source SetsUniversity of North Texas
LanguageEnglish
Detected LanguageEnglish
TypeThesis or Dissertation
Formatvi, 108 leaves: ill., Text
CoverageUnited States - Texas - Denton County - Denton, United States - Texas - Tarrant County - Fort Worth
RightsPublic, Page, Kimberly Ann, Copyright, Copyright is held by the author, unless otherwise noted. All rights

Page generated in 0.0016 seconds