Dilated Cardiomyopathy: Symptoms, Causes, Treatment

Dilation can impair pumping, cause fluid retention and affect rhythm. The diagnosis describes a structural and functional pattern requiring investigation of its cause. An enlarged-heart image alone is insufficient, and improved function does not justify stopping medicines yourself.

Related reading: When should I see a cardiologist?.

Symptoms may include fatigue, exertional or lying-flat breathlessness, swollen legs and fluid-related weight gain. Palpitations or dizziness may occur; some cases are detected before symptoms. Worsening features should be reported to the care team.

Possible contributors include genetic susceptibility, inflammatory injury, alcohol, toxins, some medicines and sustained abnormal rhythms. Particular cases arise around pregnancy. Coronary, valve and other causes of weak cardiac function are also assessed before final classification.

Relevant history includes cardiomyopathy or sudden death in relatives, toxic exposures, cancer treatment, prior illnesses and rhythm disorders. A risk factor does not make disease inevitable; suspected familial disease needs a targeted screening plan.

Echocardiography measures chamber size and function, alongside ECG, blood tests and selected rhythm monitoring. MRI, coronary assessment or cause-specific tests may be needed. Family history guides relatives’ screening and genetic counselling; biopsy is not routine for everyone.

Management addresses the cause and uses evidence-based heart-failure medicines, with diuretics for congestion and monitoring of blood pressure, kidneys and electrolytes. Selected patients benefit from pacing or defibrillator devices; severe cases may need advanced therapies. Anticoagulation requires a specific indication.

Complications include heart failure, arrhythmias and clot formation in particular circumstances. Responses vary, and some patients recover function. Follow-up remains important after improvement to reassess relapse, medicines and rhythm risk.

Avoid alcohol and cardiotoxic substances, take prescribed medicines and manage associated conditions. Activity, rehabilitation, salt and fluid advice should be individualized rather than universally restrictive. Tracking weight and symptoms according to the care plan helps detect congestion.