It would depend to some extent on the degree of enlargement and whether it is affecting the heart's pumping ability. Many people with mild left ventricle hypertrophy live a normal lifespan, or so says the Mayo Clinic web site.
Prognosis depends opon the underlying cause. A pathologically enlarged heart (some athletes have an enlarged heart that is not pathological and will return to normal size when rigirous activity is discontinued...slow heart rate at rest distinquishes) pathologic size will impair contractility of the left ventricle and continue to enlarge if untreated leading to heart failure.
Dilated hypercardiomyopathy can with treatment reverse remodeling. Dilated HCM enlarges left ventricle due to stressful workload usually as a result of abnormal burden such as high blood pressure that increase heart's afterload. Medication to reduce the afterload often reverses remodeling.
Other conditions such concentric, restrictive HCM may never reverse remodeling, but treatment can slow the progression.
Five years ago, I had a dilated LV causing a low EF leading to congested heart failure. Medication has raised my EF to normal as well as a normal size LV.
SIR, MY MOTHER IS DILATED CARDIOMYOPATHY, AND IN ECHO LVEF 30% AND IN ANGIOGRAPHY SHOWS 20%, IN AGIOGRAPHY IT SEEMS LVSD AND DR. ADVISE HER TO AICD IMPLANTATION.. AND SHE IS DIEBTIC PATIENT OF 48 YEARS.
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