We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Acute effect of static exercise on the cardiovascular system: assessment by cardiovascular magnetic resonance.
- Authors
Alegret, Josep; Beltrán-Debón, Raúl; La Gerche, Andre; Franco-Bonafonte, Luis; Rubio-Pérez, Francisco; Calvo, Nahum; Montero, Manuel
- Abstract
Purpose: The acute effect of static exercise on the global dynamics of the cardiovascular system is poorly understood. The use of cardiovascular magnetic resonance (CMR) may be useful for evaluating this effect. Methods: A total of 12 healthy individuals underwent CMR imaging at rest and while performing a maximal sustained static exercise (weight elevation with both legs). We analyzed the effects on left and right ventricular function, ascending aorta dynamics, and venous capacitance using standard cine and phase-contrast sequences. Results: We observed excellent reproducibility in the measurements of the images obtained at rest as well as during static exercise. During exercise, we observed reduced left (−35 ± 8 %, p < 0.001) and right (−44 ± 9 %, p < 0.001) ventricle end-diastolic volumes, reduced left (−35 ± 16 %, p < 0.001) and right (−43 ± 8 %, p < 0.001) ventricle end-systolic volumes (both with a significantly greater reduction in the right ventricle), a reduced superior vena cava cross-sectional area (−20 ± 17 %, p = 0.003), and increased left ventricle wall thickness. We estimated that there was an increase in left ventricle contractility. There were no significant changes in the left and right ventricular ejection fractions. During exercise, we noted a tendency toward decreased aortic distensibility and a reduction of ascending aorta systolic expansion. Conclusions: In healthy individuals, an acute maximal static exercise produced a reduction in the left ventricle, right ventricle, and superior vena cava volumes as well as signs of increased aortic stiffness without increasing left ventricular systolic wall stress. CMR is feasible and useful in evaluating the hemodynamic effects of static exercise.
- Subjects
EXERCISE physiology; CARDIOVASCULAR system physiology; MAGNETIC resonance imaging; HEART ventricles; AORTA; VENA cava superior; HEMODYNAMICS
- Publication
European Journal of Applied Physiology, 2015, Vol 115, Issue 6, p1195
- ISSN
1439-6319
- Publication type
Article
- DOI
10.1007/s00421-015-3101-4