Key result
A decrease in left ventricular ejection fraction during exercise of more than 6% predicted the development of symptoms with 83.3% sensitivity and 76.2% specificity over 18 months.
Why the study?
Does contrast exercise echocardiography predict the development of symptoms or left ventricular dysfunction in asymptomatic men with severe chronic aortic regurgitation?
Cohort (n=49)
No
Does contrast exercise echocardiography predict the development of symptoms or left ventricular dysfunction in asymptomatic men with severe chronic aortic regurgitation?
Effect estimate: AUC 0.802 (95% CI 0.661-0.902)
Contrast exercise echocardiography can help identify asymptomatic men with severe aortic regurgitation who are at high risk of developing symptoms and may benefit from earlier surgical intervention.
Exercise LVEF decline may flag symptom risk in asymptomatic severe AR; hypothesis-generating for earlier intervention pending validation.
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Marek et al. (2006) conducted a cohort in Asymptomatic severe chronic aortic regurgitation (n=49). Contrast exercise echocardiography (decrease in LVEF > 6%) vs. Decrease in LVEF ≤ 6% was evaluated on Development of symptoms or resting systolic dysfunction (AUC 0.802, 95% CI 0.661-0.902). A decrease in left ventricular ejection fraction during exercise of more than 6% predicted the development of symptoms with 83.3% sensitivity and 76.2% specificity over 18 months.
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