Inherited Cardiomyopathies

Catecholaminergic Polymorphic Ventricular Tachycardia (CPVT)

CPVT, or Catecholaminergic Polymorphic Ventricular Tachycardia, is an inherited arrhythmia syndrome that affects 1 out of 5,000 in the population.  It is caused most commonly by abnormal control of calcium movement in heart muscle cells. Individuals with CPVT may have symptoms from abnormal heart rhythms (arrhythmias), including palpitations, episodic lightheadedness, or fainting episodes.

Brugada Syndrome

Brugada Syndrome is an inherited arrhythmia syndrome that affects 1 out of 5000 in the population.  It is caused by abnormal electrical recharging of the heart, most commonly due to abnormal channels in heart muscle cells that control the flow of sodium. Individuals with Brugada Syndrome may have symptoms from abnormal heart rhythms (arrhythmias), including palpitations, fainting or seizures. Arrhythmias often occur at times of rest or with fevers, and affect men more seriously than women. There is a large amount of variability in the risk of arrhythmias among individuals with Brugada Syndrome, even within the same family. Evaluation of the whole family is important since the condition is often passed on to the next generation of a family but may not cause symptoms initially.

Long QT Syndrome

Long QT syndrome is an inherited arrhythmia syndrome that affects 1 out of 2000 in the population.  It is caused by longer electrical recharging of the heart after each heart beat.  This longer recharging time is most commonly due to abnormal channels in heart muscle cells that control the flow of potassium and sodium electrolytes.

Familial Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a heart muscle condition characterized by gradual weakening of the heart muscle. While DCM may be caused by other conditions, including myocardial infarction, many cases are now known to be caused by genetic mutations carried in families. Individuals with DCM may be only mildly affected or may be severely affected, even in the same family.

Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC)

Arrhythmogenic right ventricular cardiomyopathy is a rare inherited heart muscle condition that most often involves the right ventricle, which is the heart chamber responsible for pumping blood to the lungs. Individuals with ARVC may have symptoms of palpitations or fainting due to irregular heart rhythms (arrhythmias). Symptoms may also include shortness of breath due to reduced pumping function of the heart.

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