Congenital heart disease is a condition where the arteries of the heart are unable to deliver enough blood or oxygen to the heart. This is typically due to an issue with the heart that is present at birth. Symptoms include: bluish skin or lips, fatigue, fast breathing, heart murmur, poor blood circulation, week pulse or pounding heartbeat.

Cardiomyopathy is a rare condition in which the heart’s muscle becomes stiff, thick or enlarged making it difficult for the heart to pump blood. There are two types of cardiomyopathies, dilated cardiomyopathy and hypertrophic cardiomyopathy. While the prognosis is good, cardiomyopathy can lead to other serious heart conditions. Symptoms include shortness of breath, fatigue, swelling of the legs, irregular heartbeat, fainting, chest pain, dizziness, and coughing when lying down.

Pulmonary hypertension happens when blood vessels in the lungs stiffen or narrow causing high blood pressure in the lungs. Pulmonary hypertension often occurs shortly after birth, and is more common in babies born prematurely, or later in life. Symptoms include: shortness of breath (especially during activity), chest pain, fatigue, lightheadedness, and swelling in the ankles and legs.

An arrhythmia is an irregular heartbeat that can cause your heart to beat too fast, too slow, or out of rhythm. Arrythmia can be mild or serious in nature and can be caused by congenital heart defects or outside factors, like smoking or stress. Symptoms include: heart palpitations, chest pain, lightheadedness, shortness of breath, fainting, sweating, paleness, anxiety, confusion, and fatigue.

A heart murmur is an unusual sound (such as a whooshing or swooshing) in the heart that happens when blood flows abnormally through the heart's valves or blood vessels. It can be detected by a stethoscope. Most heart murmurs are not serious. Symptoms of serious heart murmurs include: chest pain, shortness of breath, leg swelling, sudden weight gain, and fainting. 

Kawasaki disease (KD) primarily affects children under five. KD is treatable and happens when the immune system attacks your blood vessels, which become inflamed and swollen. Kawasaki disease is sometimes called mucocutaneous lymph node syndrome. Symptoms include: swollen lymph glands, spots on the tongue, peeling skin on the fingers and toes, red eyes, inflammation of the hands and feet, and skin rash.

Rheumatic heart disease (RHD) is caused by heart valve damage from rheumatic fever. It can occur when a strep infection is not treated. RHD is most common in children, but can also affect young adults. Symptoms include: chest pain, irregular heartbeat, shortness of breath, fatigue, weakness, lightheadedness, and swelling of the feet, ankles, or stomach.

Infections, including bacterial endocarditis, myocarditis, and pericarditis, can affect children after they are born. Newborns are at the greatest risk. Symptoms include: difficulty breathing, bluish skin or lips, heart murmur, swelling and fluid retention.