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Genetics and heart conditions

Learn about the role that genetics plays in many heart conditions that afflict children.

Diagnosis of heart-related syndromes

Learn about heart-related syndromes. A syndrome is a medical term for a collection of signs and symptoms that generally stem from a single cause.

Williams syndrome and congenital heart conditions

Health A-Z

Most children with Williams syndrome have a heart or blood vessel problem.

Marfan syndrome and congenital heart conditions

Health A-Z

Marfan syndrome is a rare hereditary disorder of connective tissue. About 60% to 80% of people with this syndrome have heart problems.

Down syndrome: Related medical conditions

Health A-Z

Children with Down syndrome may be at a higher risk for some medical conditions. Learn what these conditions are and how to manage them.

Down syndrome

Health A-Z

Down syndrome is a genetic condition present at birth. Learn about the symptoms, complications and outlook for children with Down syndrome.

Types of heart conditions

Health A-Z

Learn about the types of heart conditions that arise in children. Congenital heart defects and heart rhythm problems are among the conditions discussed.

Noonan syndrome and congenital heart conditions

Health A-Z

Noonan syndrome is a genetic condition. Learn about the symptoms and diagnosis of Noonan syndrome and the heart conditions associated with the condition.

Heart conditions: Overview

Health A-Z

Learn about different types and possible signs and symptoms of heart conditions in children.

Hypoplastic left heart syndrome (HLHS)

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Learn about hypoplastic left heart syndrome (HLHS). This condition involves the left side of the heart being underdeveloped, and is extremely serious.

Heart rhythm problems (arrhythmias)

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Learn about heart rhythm problems. Usually identified as an irregular heartbeat, they can occur at any age and may or may not have symptoms.

Multisystem inflammatory syndrome in children (MIS-C)

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Learn about multisystem inflammatory syndrome in children (MIS-C), a rare syndrome linked to a SARS-CoV-2 infection.

CHARGE syndrome

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The effects of CHARGE syndrome differ from one child to the next. Find out how this genetic condition is caused and treated.

Playing sports with congenital heart disease

Health A-Z

Learn about safe levels of activity for adults with congenital heart disease. Activity generally has positive effects on the body and its organs.

Single ventricle anomalies

Health A-Z

Learn about single ventricle anomalies. This term refers to a group of severe conditions in which only one ventricle is of adequate size, such as hypoplastic left heart syndrome (HLHS).

Lennox-Gastaut syndrome

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Read about the causes and symptoms of Lennox-Gastaut syndrome epilepsy and how the condition is treated.

Post-thrombotic syndrome

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Post-thrombotic syndrome occurs when deep-vein thrombosis damages the vein valves and walls. Learn the signs and symptoms and how it's treated.

Atrioventricular septal defect (AVSD)

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Learn about atrioventricular septal defects (AVSD) in children. This condition involves the lung overfilling with blood.

Heart

Learning Hub

Information about different heart conditions, including congenital heart conditions such as atrial septal defect and patent ductus arteriosus. Also discussed are arrhythmias, blue spells and congestive heart failure.

22q11 deletion syndrome (22q11DS)

Health A-Z

22q11 deletion syndrome (22q11DS) is a genetic condition. Learn what causes it, how it's diagnosed and treated.

Potential complications of heart surgery

Health A-Z

The risk of complications involved with surgical procedures to correct congenital heart disease is very low.

Turner syndrome

Health A-Z

An overview of the causes, symptoms and complications of Turner syndrome.

Shiga toxin-producing E. coli hemolytic uremic syndrome (STEC HUS)

Health A-Z

Shiga toxin-producing E. coli hemolytic uremic syndrome (STEC HUS) is a disease that mainly affects the kidneys and blood cells. Learn about what STEC HUS is, how it affects your child and what to expect during treatment.

Genetics

Learning Hub

Genetics can play an important role in your family's health. Learn more about genetics; genetic counselling, screening, and diagnosis; different genetic conditions; and how genetics relate to understanding and managing overall health.

Health-care provider and child reaching to high-five across a desk between them. The child sits on a parent's lap.

Dravet syndrome

Health A-Z

Learn about Dravet syndrome, a rare and severe type of genetic epilepsy in children.