..The biotech company tested its drug, EDG-7500, in healthy volunteers and patients with obstructive hypertrophic cardiomyopathy. In this disease, a genetic mutation causes the heart ventricles to thicken. This limits cardiac function and exercise capacity.
After a single dose, patients showed improved blood flow from the left ventricle. But sometimes drugs can do their job too well, suppressing cardiac function — a measure known as reduced left ventricular ejection fraction, or LVEF. But patients didn't show meaningful reductions in LVEF.. my emphasis
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