Echo derived variables predicting exercise tolerance in patients with dilated and poorly functioning left ventricle
Why the study?
Can resting echocardiographic measurements predict exercise tolerance in patients with systolic left ventricular disease?
Population
21 patients with systolic left ventricular disease with end diastolic dimension > 6.4 cm, shortening…
Design
Cross-sectional
Authors
Discussion
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Implication
RV parameters may estimate exercise tolerance in systolic LV dysfunction; hypothesis-generating, needs prospective validation before clinical use.
Structured PICO
Can resting echocardiographic measurements predict exercise tolerance in patients with systolic left ventricular disease?
P
Population
21 patients with systolic left ventricular disease (11 with coronary artery disease, 10 with idiopathic dilated cardiomyopathy) with end diastolic dimension > 6.4 cm, shortening fraction < 25%, and in sinus rhythm, along with 11 age-matched normal controls.
I
Intervention
Resting echocardiography
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Outcome
Peak oxygen consumption (mVo2) during cardiopulmonary exercise testingsurrogate
Resting echocardiographic parameters, particularly right ventricular long axis excursion, can predict a significant portion of the variance in exercise tolerance in patients with systolic left ventricular dysfunction.
Cite This Study
Webb-Peploe et al. (1998) studied this question.