Plakophilin-2 is required for transcription of genes that control calcium cycling and cardiac rhythm.

What is the purpose of the Plakophilin gene?

The PKP2 gene provides instructions for making a protein called plakophilin 2. This protein is found primarily in cells of the myocardium, which is the muscular wall of the heart.

What is arrhythmogenic right ventricular dysplasia?

Arrhythmogenic right ventricular dysplasia / cardiomyopathy (ARVD/C) is a rare familial disorder that may cause ventricular tachycardia and sudden cardiac death in young, apparently healthy individuals. The clinical hallmark of the disease is ventricular arrhythmias, arising predominantly from the right ventricle.

What is right ventricular cardiomyopathy?

Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a disease of the heart muscle. In this disease, fatty fibrous tissue replaces normal heart muscle. This interrupts normal electrical signals in the heart and may cause irregular and potentially life-threatening heart rhythms.

Is ARVD hereditary?

In autosomal recessive inheritance, an individual has to have two copies of a gene associated with ARVD to get the disease. A person has a 25% chance of inheriting both copies of the gene changes responsible for ARVD (one from each parent).

T B Rasmussen - The majority of plakophilin-2 mutations in ARVC are associated...

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Is there a cure for ARVD?

There is no known curative treatment for ARVD. Treatment is usually directed at controlling the patient's ventricular arrhythmias and managing heart failure. The primary goal of treatment is preventing sustained ventricular arrhythmias and/or sudden death.

Can I exercise with ARVC?

For now, it is clear that competitive sports should be avoided in patients with ARVC. Participation in moderate- to high-intensity recreational sports is also discouraged. The recommendations for activity restrictions in asymptomatic gene carriers (genotype positive/phenotype negative) have less data.

How is right ventricular cardiomyopathy diagnosed?

Endomyocardial biopsy

A definitive diagnosis of ARVC relies on the histological demonstration of full thickness substitution of the right ventricular myocardium by fatty or fibrofatty tissue at postmortem examination.

Is arrhythmogenic right ventricular cardiomyopathy congenital?

Arrhythmogenic right ventricular cardiomyopathy (ARVC) presents a diagnostic challenge in the young, where phenotypic features may be absent and findings may overlap with congenital heart disease (CHD).

What are the symptoms of right heart failure?

What are the symptoms of right-sided heart failure?

• shortness of breath, especially when lying flat.
• coughing.
• dizziness.
• difficulty concentrating and confusion.
• fatigue and low energy.
• sudden weight gain.
• reduced appetite.
• upset stomach.

What causes arrhythmogenic right ventricular dysplasia?

Arrhythmogenic right ventricular dysplasia (ARVD) or cardiomyopathy (ARVC) is caused by several genetic defects, affecting desmosomes, which are proteins on the surface of heart muscle cells that link those cells together. These genetic defects lead to abnormalities in the lower heart chambers, the ventricles.

What is arrhythmogenic effect?

Antiarrhythmic therapy in 506 consecutive patients undergoing 1,268 antiarrhythmic drug trials for ventricular tachycardia or ventricular fibrillation was reviewed for evidence of arrhythmogenic drug effect defined as the occurrence of a new form of ventricular tachyarrhythmia temporally associated with initiation of ...

How does ARVC affect my life expectancy?

We concluded that ARVC at locus ARVD5 is a lethal, fully penetrant, sex-influenced morbid disorder. Median life expectancy was 41 years in affected males compared to 71 years in affected females (relative risk 6.8, 95% CI 1.3–10.9). Heart failure was a late manifestation in survivors.

What does a Desmosome do?

Desmosomes are adhesive intercellular junctions that mechanically integrate adjacent cells by coupling adhesive interactions mediated by desmosomal cadherins to the intermediate filament cytoskeletal network.

Can ARVC skip a generation?

Most often, ARVC is inherited in an autosomal dominant manner. This means that each child of a parent with ARVC has a 50% chance of inheriting the genetic mutation associated with the condition. The genetic mutation does not skip generations.

Is ARVC dominant or recessive?

Most familial cases of the disease have an autosomal dominant pattern of inheritance, which means one copy of an altered gene in each cell is sufficient to cause the disorder. Rarely, ARVC has an autosomal recessive pattern of inheritance, which means both copies of a gene in each cell have mutations.

What is Naxos disease?

Naxos disease is a recessive association of arrhythmogenic right ventricular cardiomyopathy (ARVC) with wooly hair and palmoplantar keratoderma or similar skin disorder.

How common is arrhythmogenic cardiomyopathy?

Arrhythmogenic cardiomyopathy is a genetic cardiomyopathy thought to affect 1 in 5000 people, where the heart muscle (myocardium) is replaced by both scar (fibrosis) and fat.

How is arrhythmogenic right ventricular dysplasia treated?

ARVD can be treated with medicines. These include: Medicines to help prevent abnormal heart rhythms (antiarrhythmics) Medicines to control your heartbeat, such as beta-blockers.
...
Other possible treatments include:

1. Catheter ablation. ...
2. Implantable cardioverter defibrillator (ICD). ...
3. Heart transplant.

Is cardiomyopathy cardiovascular disease?

Cardiomyopathy (kahr-dee-o-my-OP-uh-thee) is a disease of the heart muscle that makes it harder for your heart to pump blood to the rest of your body. Cardiomyopathy can lead to heart failure. The main types of cardiomyopathy include dilated, hypertrophic and restrictive cardiomyopathy.

Is cardiomyopathy a death sentence?

Normally, when people look up cardiomyopathy, they're terrified by talk of a five-year life expectancy. That's nonsense. As long as you're diagnosed early, it's definitely not a death sentence.

Can ARVC be misdiagnosed?

Although the diagnostic criteria were published and extensively publicized, misdiagnosis of ARVC remains a problem mainly due to incomplete evaluations and misinterpretation of both the diagnostic test, namely cardiac magnetic resonance imaging (CMR), and the diagnostic Task Force Criteria (TFC).

Is ARVC progressive?

ARVC is a progressive disease, which means that it worsens over time. The early stages may be very subtle and difficult to diagnose. Later stages of ARVC affect more of the heart muscle and lead to more prominent and frequent symptoms.

Can you have a baby with ARVC?

These results suggest that most pregnancies of patients with ARVD/C are tolerated well. However, 13% of pregnancies were complicated by sustained ventricular arrhythmias and 5% by onset of heart failure.

Is walking good for cardiomyopathy?

Daily light exercise is safe for most people with cardiomyopathy and heart failure and can help them to manage symptoms. Over time, it can reduce heart rate and blood pressure. Your NYU Langone heart specialist can recommend an exercise program that's right for you. It may include walking, cycling, or jogging.