Why the study?
How does the echocardiographic and hemodynamic response to the Valsalva maneuver differ between healthy subjects, patients with normal ejection fractions, and patients with heart failure and depressed ejection fractions?
Population
30 subjects divided into three groups: 10 normal volunteers, 10 patients with no history of heart failure…
Comparison
Valsalva maneuver evaluated by echocardiography vs Comparison between normal volunteers, patients…
Design
Cross-sectional
Authors
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Valsalva echocardiography may identify fixed output in HFrEF; hypothesis-generating for diagnostic phenotyping pending validation.
How does the echocardiographic and hemodynamic response to the Valsalva maneuver differ between healthy subjects, patients with normal ejection fractions, and patients with heart failure and depressed ejection fractions?
Echocardiography during the Valsalva maneuver demonstrates that patients with heart failure and depressed ejection fractions have a fixed stroke output and a square wave pressure response, unlike those with normal ventricular function.
Parisi et al. (1976) studied this question.
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