期刊
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
卷 43, 期 6, 页码 974-981出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1249/MSS.0b013e31820607a3
关键词
CARDIAC; WALL STRESS; RIGHT VENTRICLE; ECHOCARDIOGRAPHY; MAGNETIC RESONANCE; LAPLACE
资金
- Pfizer, Australia
- National Health and Medical Research Council/National Heart Foundation, Australia
- National Health and Medical Research Council, Australia
LA GERCHE, A., H. HEIDBUCHEL, A. T. BURNS, D. J. MOONEY, A. J. TAYLOR, H. B. PFLUGER, W. J. INDER, A. I. MACISAAC, and D. L. PRIOR. Disproportionate Exercise Load and Remodeling of the Athlete's Right Ventricle. Med. Sci. Sports Exerc., Vol. 43, No. 6, pp. 974-981, 2011. Purpose: There is evolving evidence that intense exercise may place a disproportionate load on the right ventricle (RV) when compared with the left ventricle (LV) of the heart. Using a novel method of estimating end-systolic wall stress (ES-sigma), we compared the RV and LV during exercise and assessed whether this influenced chronic ventricular remodeling in athletes. Methods: For this study, 39 endurance athletes (EA) and 14 nonathletes (NA) underwent resting cardiac magnetic resonance (CMR), maximal oxygen uptake (V (over dot)O(2)), and exercise echocardiography studies. LV and RV end-systolic wall stress (ES-sigma) were calculated using the Laplace relation (ES-sigma - Pr/(2h)). Ventricular size and wall thickness were determined by CMR; invasive and Doppler echo estimates were used to measure systemic and pulmonary ventricular pressures, respectively; and stroke volume was quantified by Doppler echocardiography and used to calculate changes in ventricular geometry during exercise. Results: In EA, compared with NA, resting CMR measures showed greater RV than LV remodeling. The ratios RV ESV/LV ESV (1.40 +/- 0.23 vs 1.26 +/- 0.12, P = 0.007) and RV mass/LV mass (0.29 +/- 0.04 vs 0.25 +/- 0.03, P = 0.012) were greater in EA than in NA. RVES-sigma was lower at rest than LVES-sigma (143 +/- 44 vs 252 +/- 49 kdyn.cm(-2), P < 0.001) but increased more with strenuous exercise (125% vs 14%, P < 0.001), resulting in similar peak exercise ES-sigma (321 +/- 106 vs 286 +/- 77 kdyn.cm(-2), P = 0.058). Peak exercise RVES-sigma was greater in EA than in NA (340 +/- 107 vs 266 +/- 82 kdyn.cm(-2), P = 0.028), whereas RVES-sigma at matched absolute workloads did not differ (P = 0.79). Conclusions: Exercise induces a relative increase in RVES-sigma which exceeds LVES-sigma. In athletes, greater RV enlargement and greater wall thickening may be a product of this disproportionate load excess.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据