1.   ACE inhibitors also seem to prevent heart enlargement.

2.   Heart enlargement and cancer were possible side effects.

3.   Heart enlargement can lead to dangerous rhythm abnormalities and heart failure.

4.   People suffering from that condition, a birth defect involving heart muscle enlargement and an overly vigorous heartbeat, can die suddenly if they overexert themselves.

5.   The condition, hypertrophic cardiomyopathy, involves heart muscle enlargement and an overly vigorous heartbeat.

6.   When calcium levels get high enough, calcineurin activates yet another protein, which in turn switches on the genes that cause heart enlargement.