• Shortness of breath
• Decreasing ability to tolerate physical exertion
• Chest pain - also known as "angina," consists of a feeling of sharp, unrelenting pressure the middle of the chest (more common in ischemic cardiomyopathy)
• Fainting - especially after activity; temporary and brief loss of consciousness
• Light-headedness - especially after activity
• Dizziness
• Palpitations - the sensation of feeling the heart beat
• High blood pressure

Additional symptoms that may occur:

• Swelling of legs, ankles, or other portion of the body
• Abdominal swelling or enlargement (liquid in the abdomen is called "ascites")
• Low amount of urine during daytime
• Need to urinate at night
• Fatigue
• Change in mental status
• Decreased alertness
• Difficulty concentrating
• Cough - may be caused by extra liquid accumulating in the lungs, secondary to heart failure
• Loss of appetite
• Deconditioning may occur as a consequence of the other symptoms, leading to a reduction in the heart's muscle mass

Examination may reveal an irregular heartbeat. Heart sounds and breath sounds may be abnormal. Additionally, there may be other signs of heart failure.

Decreased heart function and heart enlargement may appear in these tests:

• Coronary angiography
• Echocardiogram and ultrasound examination of the heart.
• Chest x-ray
• Chest CT scan
• MRI of chest
• ECG

Rarely, a heart biopsy may be needed to rule out other disorders. The following lab tests may be used to rule out other disorders and to assess the condition of the heart:

• CBC
• Coronary risk profile
• Blood chemistries
• Cardiac enzymes: (CPK isoenzymes, CK-MB, LDH isoenzymes)