Effect of ageing on left ventricular compliance and distensibility in healthy sedentary humans

Naoki Fujimoto, Jeffrey L. Hastings, Paul S. Bhella, Shigeki Shibata, Nainesh K. Gandhi, Graeme Carrick-Ranson, Dean Palmer, Benjamin D. Levine

Research output: Contribution to journalArticle

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Abstract

Healthy, but sedentary ageing leads to marked atrophy and stiffening of the heart, with substantially reduced cardiac compliance; but the time course of when this process occurs during normal ageing is unknown. Seventy healthy sedentary subjects (39 female; 21-77 years) were recruited from the Dallas Heart Study, a population-based, random community sample and enriched by a second random sample from employees of Texas Health Resources. Subjects were highly screened for co-morbidities and stratified into four groups according to age: G 21-34: 21-34 years, G 35-49: 35-49 years, G 50-64: 50-64 years, G ≥65: ≥65 years. All subjects underwent invasive haemodynamic measurements with right heart catheterization to define Starling and left ventricular (LV) pressure-volume curves. LV end-diastolic volumes (EDV) were measured by echocardiography at baseline, -15 and -30 mmHg lower-body negative pressure, and 15 and 30 ml kg -1 saline infusion with simultaneous measurements of pulmonary capillary wedge pressure. There were no differences in heart rate or blood pressures among the four groups at baseline. Baseline EDV index was smaller in G ≥65 than other groups. LV diastolic pressure-volume curves confirmed a substantially greater LV compliance in G 21-34 compared with G 50-64 and G ≥65, resulting in greater LV volume changes with preload manipulations. Although LV chamber compliance in G 50-64 and G ≥65 appeared identical, pressure-volume curves were shifted leftward, toward a decreased distensibility, with increasing age. These results suggest that LV stiffening in healthy ageing occurs during the transition between youth and middle-age and becomes manifest between the ages of 50 to 64. Thereafter, this LV stiffening is followed by LV volume contraction and remodelling after the age of 65.

Original languageEnglish (US)
Pages (from-to)1871-1880
Number of pages10
JournalJournal of Physiology
Volume590
Issue number8
DOIs
StatePublished - Apr 2012

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Compliance
Ventricular Pressure
Lower Body Negative Pressure
Blood Pressure
Starlings
Pulmonary Wedge Pressure
Health Resources
Occupational Health
Cardiac Catheterization
Stroke Volume
Atrophy
Echocardiography
Healthy Volunteers
Heart Rate
Hemodynamics
Morbidity
Pressure
Population

ASJC Scopus subject areas

  • Physiology

Cite this

Effect of ageing on left ventricular compliance and distensibility in healthy sedentary humans. / Fujimoto, Naoki; Hastings, Jeffrey L.; Bhella, Paul S.; Shibata, Shigeki; Gandhi, Nainesh K.; Carrick-Ranson, Graeme; Palmer, Dean; Levine, Benjamin D.

In: Journal of Physiology, Vol. 590, No. 8, 04.2012, p. 1871-1880.

Research output: Contribution to journalArticle

Fujimoto, Naoki ; Hastings, Jeffrey L. ; Bhella, Paul S. ; Shibata, Shigeki ; Gandhi, Nainesh K. ; Carrick-Ranson, Graeme ; Palmer, Dean ; Levine, Benjamin D. / Effect of ageing on left ventricular compliance and distensibility in healthy sedentary humans. In: Journal of Physiology. 2012 ; Vol. 590, No. 8. pp. 1871-1880.
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