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Supernormal left ventricular diastolic function in triathletes.

P J Claessens¹, C W Claessens, M M Claessens

¹Department of Cardiology, Imeldaziekenhuis, Bonheiden, Belgium.

Texas Heart Institute Journal

|July 17, 2001

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Triathletes exhibit supernormal heart function, specifically enhanced left ventricular diastolic function, despite cardiac hypertrophy. This indicates improved diastolic reserves in endurance athletes.

Area of Science:

Cardiology
Sports Medicine
Physiology

Background:

Athletic training can induce cardiac structural and functional adaptations.
Understanding these adaptations is crucial for assessing athlete health and performance.

Purpose of the Study:

To investigate cardiac structural and functional adaptations in male triathletes.
To compare left ventricular diastolic function between triathletes and active non-athletic men.

Main Methods:

Two-dimensional Doppler echocardiography and pulsed Doppler tissue imaging were used.
Transmitral flow velocities and interventricular septal motion were analyzed.
Left ventricular diastolic function was assessed, accounting for preload, atrial, and aortic pressures.

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Main Results:

Triathletes showed normal left ventricular diastolic function, superior to controls, despite mixed hypertrophy.
Pulsed Doppler tissue imaging confirmed supernormal diastolic function, evidenced by E/A ratios.
Measurements of late passive diastolic filling periods and longitudinal/transverse relaxation properties supported these findings.

Conclusions:

Triathletes develop supernormal left ventricular diastolic function.
Endurance training enhances diastolic reserves in athletes.
Doppler tissue imaging is valuable for assessing diastolic function in athletes.