best cardiac doctors near me What are 4 signs of cardiomyopathy Signs and symptoms of cardiomyopathy include Shortness of breath or trouble breathing, especially with physical exertion. Fatigue. Swelling in the ankles, feet, legs, abdomen and veins in the neck. Dizziness. Lightheadedness. Fainting during physical activity. Arrhythmias (irregular heartbeats)