Ask a family managing Duchenne muscular dystrophy what they want from their child's cardiology team, and the answer is usually the same: a calendar. Not a general sense that the heart needs watching, but the specific test, at the specific age, with a specific reason attached to it. That calendar exists, but it's rarely handed over in one piece.

Here's the monitoring schedule laid out by stage, along with what changes at each point and what to bring to the appointment where that change gets discussed.

At Diagnosis, or by Age 6 if Diagnosed Earlier

The first cardiac workup happens at diagnosis, regardless of how old your child is when that diagnosis lands. If diagnosis comes earlier than age 6, cardiology still starts the clock at 6.

The baseline visit includes an electrocardiogram (ECG) and an echocardiogram or cardiac MRI. This is not a screening for a problem that might exist. It's a baseline measurement against which every future test gets compared. Ask for copies of the numeric results, specifically the ejection fraction, not just a verbal "everything looks fine."

Ages 6 to 10: Yearly Testing Begins

From this baseline forward, ECG and imaging repeat every year. Two things are being tracked simultaneously: the heart's electrical conduction and its pumping efficiency.

Electrical changes on the ECG can show up before the heart muscle itself shows any visible strain. That's why both tests run together instead of just the imaging. A normal echo with an abnormal ECG still counts as new information your cardiologist needs.

Questions worth asking at each yearly visit in this window:

"Has the ejection fraction moved since last year, even within the normal range?" "Are there new conduction findings on the ECG?" "Based on this year's results, are we still on track for medication at 10, or does anything push that timeline earlier?"

Age 10: The Medication Conversation

By age 10, most cardiology teams start ACE inhibitors or beta blockers, whether or not that year's tests show measurable dysfunction. This is the point where families are most often caught off guard, because a normal-looking echo doesn't feel like a reason to start a heart medication.

The reasoning holds up: damage at the cellular level precedes anything visible on an echo, and starting treatment before decline is measurable protects more muscle than starting after. If your child's team proposes waiting for the first sign of trouble, ask directly why age 10 isn't the default in your case. It's a reasonable question, and a reasonable cardiologist will have a specific answer tied to your child's own results rather than a general preference.

Ages 10 to 18: Medication Plus Continued Imaging

Yearly ECG and echo or MRI continue alongside the medication regimen. This period is about watching whether the current dose is holding function steady, not just whether new problems appear.

This is also the window where symptom awareness matters most for you as a parent, separate from the scheduled testing. Report new fatigue, breathlessness with activity that didn't used to cause it, or ankle swelling between visits rather than waiting for the next annual appointment. Between-visit reporting is what catches a change before it shows up on a calendar-driven test.

A tracking habit worth building here: keep a running note, even a simple one, of how many flights of stairs, how much walking, or how long a wheelchair transfer takes without your child getting winded. Cardiologists ask about functional capacity, and a specific comparison over time gives them more to work with than "he seems more tired."

The Transition to Adult Cardiology

Somewhere between 16 and 18, depending on the clinic, cardiac care shifts from a pediatric cardiologist to an adult congenital or adult cardiology specialist with DMD experience. This transition gets far less attention than the diagnosis-to-10 stretch, and it's where continuity most often breaks down.

Before the handoff, request a complete cardiac history summary, not just a referral letter. That should include every ejection fraction result on record, the date medications started, dose changes and why they happened, and any conduction abnormalities noted over the years. Adult cardiology teams that don't specialize in neuromuscular disease may not automatically know the DMD-specific monitoring logic, so arriving with the full record prevents the new team from restarting the workup from scratch.

If your area doesn't have an adult specialist with neuromuscular cardiac experience, ask the pediatric team for a referral to the nearest one, even if it means traveling. A single annual visit at a specialized center, with routine follow-up handled locally, works better than ongoing care from a team unfamiliar with the disease course.

Coordinating the Schedule with School and Daily Life

Cardiac monitoring stages line up with decisions schools ask about separately, and it helps to connect them instead of handling each in isolation. A cardiology note about current ejection fraction and any activity restrictions can go directly into IEP or 504 documentation for PE and recess planning, so the school isn't guessing at what your child can do.

Set calendar reminders tied to the schedule itself: baseline test date, yearly test month going forward, and the age-10 medication review. Families managing multiple specialists for DMD, neurology, pulmonology, orthopedics, often find the cardiac calendar is the one that anchors the others, since it runs on the most predictable clock of the group.

The schedule doesn't change based on how your child is doing that particular year. It runs regardless, because the point is catching what testing shows before symptoms do. Showing up with last year's numbers in hand, and a specific question tied to this year's stage, is what makes each visit count.