Guide — Cardiac
Cardiomyopathy Nursing Care
Cardiomyopathy is disease of the heart muscle itself, in three flavors: a baggy, weak pump (dilated), a thick, stiff, obstructing muscle (hypertrophic), and a rigid wall that won’t fill (restrictive). The one that kills young athletes without warning is hypertrophic.
8 min read · Cardiac
Educational use only. Cardiomyopathy management — including device therapy and activity restriction — is provider-directed and individualized. This is educational background for nursing care. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
Overview
Cardiomyopathy is structural/functional disease of the myocardium not explained by valve or coronary disease alone. The three classic types differ by what goes wrong with the muscle: dilated (the ventricle stretches thin and pumps weakly — systolic failure), hypertrophic (the muscle thickens, stiffens, and can obstruct outflow — diastolic problem + arrhythmia/sudden-death risk), and restrictive (the wall becomes rigid and can’t fill — the least common). All can progress to heart failure, dysrhythmias, and emboli.
Key Concepts
Dilated (the most common)
The chambers enlarge and the walls thin, so the heart is a weak pump with a low ejection fraction — systolic heart failure. Causes include alcohol, ischemia, viral myocarditis, peripartum, and genetics. Blood stasis in the dilated chambers promotes clots and emboli (often anticoagulated).
Hypertrophic (HCM) — the sudden-death one
Genetic thickening (often the septum) makes the ventricle stiff (poor filling) and can obstruct outflow (HOCM). It is the leading cause of sudden cardiac death in young athletes — exertional syncope, chest pain, palpitations, and a murmur that worsens with less filling (Valsalva, standing). Avoid anything that drops preload/afterload (dehydration, vasodilators, intense exertion).
Restrictive (the rare one)
The myocardium becomes rigid/non-compliant (amyloidosis, sarcoidosis, hemochromatosis, fibrosis), so ventricles can’t fill — diastolic failure with prominent right-heart congestion. Often the hardest to treat.
Shared risks: arrhythmia & sudden death
All types raise the risk of dangerous dysrhythmias; many patients receive an implantable cardioverter-defibrillator (ICD) for sudden-death prevention. Family screening matters for the genetic forms (HCM, some dilated).
Assessment Findings
Expect heart-failure signs (dyspnea, fatigue, edema, orthopnea, crackles, JVD), dysrhythmias (palpitations, syncope), and a murmur. For HCM, screen for exertional syncope, chest pain, palpitations, and family history of sudden death — a young athlete with these is a red flag. Diagnosis is by echocardiography (chamber size, wall thickness, ejection fraction, outflow obstruction). Assess activity tolerance, alcohol use, and pregnancy/peripartum status.
Nursing Priorities
Manage heart failure (type-appropriately)
Dilated CM is treated like systolic heart failure (beta-blockers, ACE inhibitors/ARBs, diuretics, aldosterone antagonists). HCM is different: avoid aggressive diuresis and vasodilators that reduce filling/increase obstruction; beta-blockers/calcium-channel blockers help by slowing the rate and improving filling.
Prevent and respond to dysrhythmias
Monitor rhythm, support ICD candidates, and educate ICD recipients. Anticoagulate as ordered (especially dilated CM with low EF or atrial fibrillation) to prevent emboli.
Counsel activity — especially in HCM
For hypertrophic cardiomyopathy, reinforce avoiding strenuous/competitive exertion and dehydration, which can trigger fatal arrhythmias. Promote a heart-failure self-care plan for all types.
Address reversible contributors & family
Support alcohol cessation in alcoholic dilated CM, manage iron overload/sarcoid in restrictive CM, and recommend family screening for genetic forms.
Therapeutic Communication Considerations
A cardiomyopathy diagnosis — especially HCM in a young, previously healthy athlete — can feel identity-shattering, since it often means giving up competitive sport. Acknowledge that loss while explaining the life-or-death reason. For genetic forms, navigate the emotional weight of recommending that relatives be screened. ICD recipients may fear shocks; provide concrete teaching and reassurance. For alcohol- or peripartum-related dilated cardiomyopathy, address contributing factors without shaming.
Patient & Family Education
Teach the heart-failure self-care bundle: daily weights, sodium/fluid limits, medication adherence, and when to report worsening dyspnea or edema. For HCM, stress avoiding intense exertion and staying hydrated, reporting syncope or palpitations immediately, and the importance of first-degree relative screening. Teach ICD patients what a shock means and when to call. Counsel alcohol cessation where relevant and discuss future-pregnancy risk in peripartum cardiomyopathy. Reinforce follow-up echocardiograms and adherence to the specific medication plan for their type.
NCLEX Pearls
- ✦Dilated = baggy, weak pump (low EF, systolic failure); hypertrophic = thick, stiff, obstructing; restrictive = rigid, can't fill.
- ✦Hypertrophic cardiomyopathy (HCM) is the leading cause of sudden cardiac death in young athletes — screen for exertional syncope and family history.
- ✦HCM: AVOID dehydration, vasodilators, and strenuous exertion (they worsen outflow obstruction and arrhythmia risk).
- ✦Dilated CM pools blood → emboli risk → often anticoagulated; treat like systolic heart failure.
- ✦Many cardiomyopathy patients get an ICD for sudden-death prevention; recommend family screening for genetic types.
Related Resources
Standards & sources
Fact-checked Jun 20, 2026This page is written to align with American Heart Association (AHA) · American College of Cardiology (ACC) · AHA ACLS Guidelines. It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →