Left ventricular function in marathon runners - echocardiographic assessment

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Deutscher übersetzter Titel:Funktion des linken Ventrikels bei Marathonlaeufern - echokardiographische Beurteilung
Autor:Paulsen, Walter; Boughner, Derek R.; Ko, Patrick; Cunningham, David A.; Persaud, Joan A.
Erschienen in:Journal of applied physiology
Veröffentlicht:51 (1981), 4, S. 881-886, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource
Sprache:Englisch
ISSN:8750-7587, 0021-8987, 0161-7567, 1522-1601
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Erfassungsnummer:PU198202015517
Quelle:BISp

Abstract

Cardiac alterations induced by chronic isotonic exercise were assessed echocardiographically in 8 active male marathon runners aged 29 +/- 7 yr (mean +/- SD) compared with 10 sedentary controls aged 27 +/- 5 yr. The runners had a significantly higher aerobic capacity than the controls (72.8 +/- 6 vs. 41.4 +/- 6 ml/kg/min). Compared with the controls, the runners had a significantly lower heart rate at rest (49 +/- 3 vs. 73 +/- 9 beats/min) and during submaximal supine exercise at a similar absolute work load (115 +/- 11 vs. 124 +/- 12 beats/min). Similarly, the runners had a lower pressure-rate product both at rest and during submaximal exercise. The left ventricular peak velocity of circumferential fiber shortening of the runners relative to that of the controls was significantly reduced both at rest (1.40 +/- 0.08 vs. 1.64 +/- 0.08 circ/s) and during submaximal supine exercise at a similar absolute work load (2.36 +/- 0.15 vs. 2.71 +/- 0.10 circ/s). However, this reduction in Vcf was found to be directly related to the lower pressure- rate product of the runners and therefore did not reflect a decreased intrinsic myocardial contractility in the runners relative to the controls. Verf.-Referat