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Williams syndrome and congenital heart conditions

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

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.

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.

Genetics and heart conditions

Health A-Z

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

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.

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.

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.

Hypoplastic left heart syndrome (HLHS)

Health A-Z

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

Heart conditions: Overview

Health A-Z

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

Multisystem inflammatory syndrome in children (MIS-C)

Health A-Z

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

Heart rhythm problems (arrhythmias)

Health A-Z

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

Lennox-Gastaut syndrome

Health A-Z

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

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.

CHARGE syndrome

Health A-Z

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

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).

Post-thrombotic syndrome

Health A-Z

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

Turner syndrome

Health A-Z

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

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.

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.

Potential complications of heart surgery

Health A-Z

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

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.

Atrioventricular septal defect (AVSD)

Health A-Z

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

22q11 deletion syndrome: Medical features

Health A-Z

22q11DS is a genetic condition with a wide range of symptoms. Learn about some of the more common medical features of 22q11DS.

Diarrhea-associated hemolytic uremic syndrome (HUS)

Health A-Z

Hemolytic uremic syndrome (HUS) is a disease that affects the kidneys and other organs. This page explains what HUS is, how it affects your child, and what to expect during treatment.