[Echocardiographic determination of left ventricular function during isometric muscle exertion and the Valsalva maneuver].
- Published Article
Acta medica Austriaca
- Publication Date
Jan 01, 1978
Left ventricular dimensions and function were estimated in 11 healthy volunteers by means of echocardiography during isometric exercise and the Valsalva manoeuvre. Isometric exercise induces a rise of heart rate and Vcf by 14% and of cardiac output as well as of the cardiac index by 12%. Stroke volume remains unchanged. During Valsalva's manoeuvre a marked decrease in left ventricular dimensions is observed. A reduction of the stroke volume by 29% was not compensated by increasing heart rate. However, cardiac output and cardiac index is found 10% below control values.
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The corresponding record at NLM can be accessed at https://www.ncbi.nlm.nih.gov/pubmed/756118