Follow Duchenne cardiac surveillance with a cardiologist experienced in DMD. Testing and preventive medication depend on age, imaging/function and current guidance; symptoms may appear late.
What this means in real life
DMD affects heart muscle even before symptoms. Cardiac surveillance should begin at diagnosis and continue regularly with a cardiologist familiar with DMD, using ECG and imaging such as echocardiography or cardiac MRI according to age, cooperation and local expertise. Symptoms can be absent despite meaningful change, so waiting for chest pain or shortness of breath is unsafe.
Care considerations support preventive cardioprotective therapy, commonly an ACE inhibitor or ARB, by around age 10 and sometimes earlier based on imaging, fibrosis, function or specialist judgment. Additional medicines such as mineralocorticoid antagonists or beta blockers may be added for fibrosis, dysfunction, rhythm or heart-failure needs. Current management must be individualized.
Keep cardiac MRI/echo values and medication doses over time. Seek prompt help for fainting, sustained palpitations, chest pain, new swelling, marked breathlessness or unexplained decline.
A practical checklist
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Establish DMD cardiology at diagnosis.
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Complete regular ECG and age-appropriate imaging.
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Discuss preventive medication timing before symptoms.
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Monitor blood pressure, kidney function and electrolytes as medicines require.
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Carry the current cardiac summary for emergencies/anesthesia.
Questions to bring with you
Use these at the clinic, school meeting, equipment evaluation, program interview or benefits call. Write down the answers and who owns the next step.
- Is cardiac MRI needed to detect fibrosis?
- When should preventive medication start?
- What values are changing over time?
- Which symptoms or rhythm findings are urgent?
- How does this affect anesthesia and gene-therapy decisions?
Important safety note
This topic can involve serious or immediate risk. Do not start, stop or change treatment from an online answer. Contact the Duchenne care team; use emergency services for urgent symptoms or danger.
Sources used for this guide
Direct links are included so families can check the original guidance and bring it to qualified professionals.
Content review: July 18, 2026. Medical labels, trials, benefits and programs can change after publication.
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