Arrhythmogenic Cardiomyopathy (AVC) in Children

Arrhythmogenic ventricular cardiomyopathy (AVC) is a rare condition that affects the heart muscle and can be associated with ventricular arrhythmias. Other names that are used interchangeably are arrhythmogenic right ventricular cardiomyopathy (ARVC), or arrhythmogenic right ventricular dysplasia (ARVD).

This condition affects the protein layers that connect the heart muscle at a microscopic level are replaced with fat and scar, impairing its ability to squeeze and relax with each heartbeat. AVC affects 1 in 2,500 individuals, gender is equally affected and commonly diagnosed in age groups of 20-40 years old, however, symptoms have been seen in all ages. The causes may be a part of other conditions that can affect the heart muscle, however more commonly it is from a cardiac genetic abnormality that alters the proteins and ions within the cells. In patients with known AVC, about 40-50% of the time a cardiac genetic mutation can be identified. This is an autosomal dominant disease, this means that if you have AVC, there is a 50% risk of passing the disease to your offspring.

Signs and Symptoms

Patients with AVC may present clinically with symptoms (see below) of atrial fibrillation, abnormal electrical system, ventricular arrhythmias, or sudden cardiac arrest.

Patients may be asymptomatic and the finding of decreased function or ventricular scar could be identified incidentally during cardiac screening if performed secondary to a significant family history of the disease.

Other commonly reported symptoms are:

  • chest pain
  • palpitations
  • heart racing
  • dizziness
  • shortness of breath
  • decrease energy 
  • fainting

The presence of any of these symptoms should be discussed with a cardiologist/electrophysiologist team.  


The diagnosis of ACM is made through a series of noninvasive tests, none of which are highly specific or sensitive. The diagnosis is made based on specific diagnostic criteria.

ARVC should be considered in patients who have syncope during exercise, exercise induced arrhythmias, survivors of cardiac arrest (particularly during exertion), frequent premature ventricular contractions (PVC’s, > 500 in 24 hours), all symptoms of above in the absence of other heart disease.

Your cardiologist may consider the following tests to help with the diagnosis:



Management depends on the severity of the disease and symptoms. Medications may be used to manage the function of the heart and the arrhythmias, commonly beta-blockers or amiodarone. For patients who are identified to be at high risk for sudden cardiac arrest, an (ICD) implantable cardio defibrillator may be necessary. Your cardiologist/electrophysiologist may recommend that you undergo electrophysiology study (EPS) with or without an ablation. A cardiac ablation is a procedure that may be recommended in an attempt to provide a potential cure or minimize the frequency of an arrhythmia. Heart transplantation is rare, but may be considered if standard medical treatment does not manage your symptoms and progressive heart failure is acquired.

For more information about living with this condition, visit


Lifestyle Changes

Avoidance of competitive strenuous sports is often recommended. All activities should first be discussed with your cardiologist and/or electrophysiologist prior to participating.

Keep Exploring

Heart Rhythm Disorders
Millions of people experience irregular or abnormal heartbeats, called arrhythmias, at some point in their lives. Most of the time, they are harmless and happen in healthy people free of heart disease. However, some abnormal heart rhythms can be serious or even deadly. Having other types of heart disease can also increase the risk of arrhythmias.
Pediatrics and Congenital Heart Disease (CHD)
This section is for pediatric patients and families living with heart rhythm disorders and heart rhythm disorders related to congenital heart disease (CHD).
Early Warning Signs
If you are experiencing a racing, pounding, rumbling or flopping feeling in your chest or if you have been fainting, having repeated dizzy spells, feeling lightheaded or you are extremely fatigued, it's time to see a doctor to discuss your heart health.
Common Treatments
Learning about the underlying cause of any heart rhythm disorder provides the basis for selecting the best treatment plan. Information and knowledge about care options, and their risks and benefits help you work with your health care provider to make the best choices.
Since other heart disorders increase the risk of developing abnormal heart rhythms, lifestyle changes often are recommended. Living a “heart healthy” lifestyle can ease the symptoms experienced with heart rhythm disorders and other heart disorders, and can be beneficial to overall patient health.
The Normal Heart
The heart is a fist-sized muscle that pumps blood through the body 24 hours a day, 365 days a year, without rest. The normal heart is made up of four parts: two atria on the top of the heart (right atrium and left atrium), and two ventricles (right ventricle and left ventricle) which are the muscular chambers on the bottom of the heart that provide the major power to pump blood.