Dilated cardiomyopathy involves enlargement of the heart muscle and is the most common type of cardiomyopathy. The heart muscle is weakened and cannot pump blood efficiently. Decreased heart function affects the lungs, liver, and other body systems.
Review Date 6/25/2020
Updated by: Micaela Iantorno, MD, MSc, FAHA, RPVI, Interventional Cardiologist at Mary Washington Hospital Center, Fredericksburg, VA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.