Hemodynamic change of left ventricle at extreme exercise: Evaluation of upright bicycle stress echocardiography in cross country racers

K. Kudo, Y. Nishimura, Y. Ueno, I. Nishi, M. Matsuzaka, Y. En, K. Minamitani, N. C. Chang

研究成果: 雜誌貢獻文章

摘要

In order to clarify the left ventricular (LV) bemodynamic change at extreme exercise, 6 male cross country racers underwent stress echocardiography with an upright bicycle ergometer. The heart rate (HR) achieved was 187±8.6 bpm, or 94.1%±4.5% of target rate. During exercise, stroke volume (SV) index (mL/m2) showed significant increase from resting (T0) to the time when the HR achieved 120 bpm (T120), and from T120 to the time when the HR reached 150 bpm (T150) (T0:T120:T150=49±6:69±11:92±6; T0 vs. T120, p120 vs. T150, p150 vs. T(max), p2) significantly increased when HR approached T150 and bit the ceiling limit (T0: T120: T150' T(max)= 2.86 ± 0.77:8.3 2 ± 1.30: 13.80±1.85:14.67±2.21; T0 vs. T120, p120 vs. T150 p150 vs. T(max) p=0.48). No significant difference in ejection fraction was observed. Results suggest that cardiac output of cross country racers reaches the ceiling before extreme exercise, and this is caused by the decrease of SV. Shortened filling period caused by tachycardia is thought to induce a decline in LV volume at extreme exercise.

原文英語
頁(從 - 到)188-191
頁數4
期刊Journal of Noninvasive Cardiology
3
發行號5-6
出版狀態已發佈 - 1999

指紋

Stress Echocardiography
Heart Ventricles
Heart Rate
Hemodynamics
Stroke Volume
Tachycardia
Cardiac Output

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Radiology Nuclear Medicine and imaging

引用此文

Hemodynamic change of left ventricle at extreme exercise : Evaluation of upright bicycle stress echocardiography in cross country racers. / Kudo, K.; Nishimura, Y.; Ueno, Y.; Nishi, I.; Matsuzaka, M.; En, Y.; Minamitani, K.; Chang, N. C.

於: Journal of Noninvasive Cardiology, 卷 3, 編號 5-6, 1999, p. 188-191.

研究成果: 雜誌貢獻文章

Kudo, K, Nishimura, Y, Ueno, Y, Nishi, I, Matsuzaka, M, En, Y, Minamitani, K & Chang, NC 1999, 'Hemodynamic change of left ventricle at extreme exercise: Evaluation of upright bicycle stress echocardiography in cross country racers', Journal of Noninvasive Cardiology, 卷 3, 編號 5-6, 頁 188-191.
Kudo, K. ; Nishimura, Y. ; Ueno, Y. ; Nishi, I. ; Matsuzaka, M. ; En, Y. ; Minamitani, K. ; Chang, N. C. / Hemodynamic change of left ventricle at extreme exercise : Evaluation of upright bicycle stress echocardiography in cross country racers. 於: Journal of Noninvasive Cardiology. 1999 ; 卷 3, 編號 5-6. 頁 188-191.
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