Key result
Exercise LVEF <=0.55 links to a ~73% cardiovascular event rate over long-term follow-up.
Why the study?
Few data are available on the prognostic implications of left ventricular response to exercise in asymptomatic patients with aortic regurgitation and normal resting LV function.
Does left ventricular ejection fraction response during exercise predict cardiovascular events in asymptomatic patients with aortic regurgitation and normal resting LV function?
Comparison
Left ventricular ejection fraction response during exercise
Design
Cohort study
Follow-up
Two to seven years
Authors
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Exercise EF ≤0.55 may flag higher event risk in asymptomatic AR; hypothesis-generating and requires prospective validation before guiding care.
Cohort (n=31)
Does left ventricular ejection fraction response during exercise predict cardiovascular events in asymptomatic patients with aortic regurgitation and normal resting LV function?
Absolute Event Rate: 72.7% vs 15%
In asymptomatic patients with aortic regurgitation and normal resting LV function, an exercise ejection fraction of ≤0.55 identifies a high-risk subset for clinical deterioration beyond 24 months.
Lindsay et al. (1987) conducted a cohort in Asymptomatic aortic regurgitation with normal resting LV function (n=31). Exercise ejection fraction ≤ 0.55 vs. Exercise ejection fraction > 0.55 was evaluated on Significant cardiovascular events. An exercise ejection fraction of 0.55 or less identified a high-risk subset for cardiovascular events, with 8 of 11 such patients experiencing events over 2 to 7 years of follow-up.
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