[Reference values of global and regional myocardial function for stress echocardiography].
Two-dimensional echocardiography has become a sensitive method to differentiate between normal and pathological myocardial function during exercise. Examining 50 healthy volunteers we determined normal values for global and regional left-ventricular function during bicycle exercise. Ejection fraction increased from 59 +/- 10% at rest to 85 +/- 7% at 210 watts workload, endsystolic volume decreased from 22.1 ml/m2 at rest to 7.1 ml/m2 at 210 watts. Enddiastolic volume showed a tendency to decrease from 55 +/- 21 ml/m2 at rest to 45 +/- 23 ml/m2 at 210 watts. Quantitative analysis showed an extended distribution both for Centerline- and Radiant-Method, during exercise Centerline-Method was superior. Two-dimensional echocardiography is useful for assessment of global and regional myocardial function during exercise. Decrease of ejection fraction or increase of endsystolic volume seems to be a pathological marker. Enddiastolic volume is a less useful parameter for evaluating left-ventricular function during stress. Quantitative analysis of left ventricular wall motion can be applied with restrictions.
Mertes
H
H
II. Medizinische Klinik und Poliklinik, Johannes-Gutenberg-Universität Mainz.
Nixdorff
U
U
Erbel
R
R
Meyer
J
J
D000328:Adult; D002302:Cardiac Output / Q000502:physiology*; D003199:Computer Systems; D004452:Echocardiography / Q000295:instrumentation*; D005080:Exercise Test / Q000295:instrumentation*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D008297:Male; D009200:Myocardial Contraction / Q000502:physiology*; D012016:Reference Values; D013599:Systole / Q000502:physiology; D016277:Ventricular Function, Left / Q000502:physiology*
Normalwerte der globalen und regionalen Myokardfunktion für die Belastungsechokardiographie.