title: [Exercise echocardiography and study of the left ventricle in sportsmen during exertion].
abstract: The use of an original ultrasonic transducer holder has made possible the recording of M mode and 2D echocardiography during exercise. Left ventricular function was studied during upright bicycle exercise in two groups: 10 trained athletes (Group A) and 10 normal subjects (Group B). All were 20 years of age. Satisfactory echocardiograms were obtained up to a mean heart rate of 180/mn which corresponded to an average work load of 180 W in Group B and 300 W in Group A. The cardiac output was comparable in the two groups up to a 180 W load, but in Group A a lower HR was compensated by a larger stroke volume (SV). The increase in SV in Group A was related to a greater LV end-diastolic dimension (LVEDD) during exercise, whereas the ejection fraction increased less than in the control group. During very strenuous exercise (Group A only) further increases in cardiac output were related mainly to an increased heart rate and to a lesser degree to increased LVEDD and ejection fraction.
authors.affiliation: Service de cardiologie, hôpital d'Instruction des Armées Desgenettes, Lyon.
authors.forename: R
authors.initials: R
authors.lastname: Brion
authors.forename: M A
authors.initials: MA
authors.lastname: Slama
authors.forename: G
authors.initials: G
authors.lastname: Peres
authors.forename: G
authors.initials: G
authors.lastname: Gonnot
authors.forename: J P
authors.initials: JP
authors.lastname: Ollivier
authors.forename: J
authors.initials: J
authors.lastname: Droniou
mesh_terms: D000328:Adult; D004452:Echocardiography; D005080:Exercise Test; D006439:Hemodynamics; D006801:Humans; D008297:Male; D005082:Physical Exertion / Q000502:physiology; D013177:Sports; D016276:Ventricular Function
vernacular_title: Echocardiographie d'effort et étude du ventricule gauche des sportifs pendant l'effort.