Heart disease symptoms caused by weak heart muscle (dilated cardiomyopathy)

Cardiomyopathy is the thickening and stiffening of heart muscle. In early stages of cardiomyopathy, you may have no symptoms. As the condition worsens, symptoms may include: Breathlessness with exertion or at rest Swelling of the legs, ankles and feet Fatigue Irregular heartbeats that feel rapid, pounding or fluttering Dizziness, lightheadedness …