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[Left ventricular function after prolonged exercise].

H Yamazaki1, S Onishi, T Sekihara

  • 1Sports Medicine Research Center, Keio University.

Kokyu to Junkan. Respiration & Circulation
|December 1, 1990
PubMed
Summary
This summary is machine-generated.

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Exhaustive exercise can temporarily impair left ventricular (LV) function, leading to reduced contractile state. However, this cardiac depression is reversible, with function returning to baseline levels post-exercise.

Area of Science:

  • Cardiology
  • Sports Medicine
  • Exercise Physiology

Context:

  • Athletes undergo extreme physical exertion during endurance events like triathlons.
  • Assessing cardiac function post-exercise is crucial for understanding physiological adaptations and potential risks.

Purpose:

  • To investigate if prolonged strenuous exercise causes depressed left ventricular (LV) contractile function.
  • To evaluate the recovery of cardiac function after an Ironman Triathlon.

Summary:

  • Echocardiographic studies in athletes before, during, and after an Ironman Triathlon assessed LV dimensions and function.
  • Results showed reduced LV end-diastolic dimension and fractional shortening (FS) at race finish compared to pre-race.
  • Despite reduced wall stress, peak circumferential shortening (maxVcf) decreased, indicating impaired LV function, which normalized during recovery.

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Impact:

  • Prolonged strenuous exercise can reversibly depress myocardial contractility.
  • Findings highlight the transient cardiac effects of extreme endurance events.
  • Suggests a need for monitoring cardiac function in athletes participating in ultra-endurance activities.