Dilated cardiomyopathy history and symptoms
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-in-Chief: Sachin Shah, M.D.
Overview
Common symptoms in the setting of dilated cardiomyopathy include chest pain, cough, fatigue, loss of appetite, and shortness of breath. A careful history is important in the setting of dilated cardiomyopathy in order to ascertain the etiology of the cardiomyopathy. The patient needs to be evaluated for a history of coronary artery disease, viral prodrome and infections, chemotherapy, HIV risk factors, pregnancy, medications, toxins, and substance abuse.
History and Symptoms
In terms of determining the etiology a careful history is most instrumental. If the patient has CAD (coronary artery disease) risk factors, known CAD, or angina then a workup for CAD should be undertaken with coronary angiography. A viral prodrome such as viral URI or viral gastroenteritis may make viral myocarditis as a more likely cause. If the patient was exposed to chemotherapy such as anthracyclines then this would be the likely cause. Patients at risk for HIV should undergo testing as HIV can cause a dilated cardiomyopathy. Peripartum cardiomyopathy most often occurs 1 month prior to expected delivery or 5 months after delivery, so recent childbirth is important information. Often by 8 months gestational age pregnancy is physically apparent but it is important to rule out pregnancy in women of childbearing age with dilated cardiomyopathy. Screening questions regarding cocaine or alcohol abuse or other toxin exposure (such as cobalt) should be addressed.
Symptoms of heart failure are most common. Usually, they develop slowly over time. However, sometimes symptoms start very suddenly and are severe.
Common symptoms are:
- Chest pain or pressure (more likely when you exercise)
- Cough
- Fatigue, weakness, faintness
- Irregular or rapid pulse
- Loss of appetite
- Shortness of breath with activity or after lying down (or being asleep) for a while
- Pedal edema (in adults]]
The clinical presentation of dilated cardiomyopathy is similar to that heart failure from any cause. Dyspnea on exertion, orthopnea, paroxysmal nocturnal dyspnea, lower extremity edema and orthostasis / syncope are all common findings in dilated cardiomyopathy. In addition, dilated cardiomyopathy may present as palpitations as a result of arrhythmia (ventricular or atrial) with the most common arrhythmia being atrial fibrillation. Dilated cardiomyopathy may also present as sudden cardiac death or as CVA (cerebrovascular accident) or other embolic phenomenon (either from associated atrial fibrillation or from ventricular thrombi as a result of dilated ventricular cavities).
Angina is not a common feature of dilated cardiomyopathy unless the cause is related to coronary artery disease. If angina is present a work up for cardiac ischemia should be undertaken.[1]
References
- ↑ Mayo Clinic Cardiology. Concise Textbook. Murphy, Joseph G; Lloyd, Margaret A. Mayo Clinic Scientific Press. 2007.