Diagnosis

In cardiac catheterization, a specially trained heart doctor (cardiologist) inserts small plastic tubes (catheters) into veins and arteries to diagnose or treat a heart condition. The doctor guides the catheters to the right places using X-ray and ultrasound images. Seattle Children’s cardiologists are leaders in safe and effective diagnostic catheterization for newborns, children and adolescents. Learn more.

CT is a special type of X-ray used to make pictures of the inside of the body. Cardiac CT is a noninvasive test we use to make a 3-dimensional picture of your child’s heart.

Our Cardiac Genetics Program offers tests, cardiac imaging and exams to diagnose genetic conditions, like connective tissue disorders, that raise the risk for serious blood vessel problems. These conditions may make the wall of the aorta bulge outward (thoracic aortic aneurysm) and cause layers of the aorta to tear and pull apart (aortic dissection). A medical geneticist and a genetic counselor will talk with you about your child’s condition and the risk that other family members or your future children might be affected. Learn more about the Cardiac Genetics Program.

Cardiac MRI is a noninvasive test that creates moving and still pictures of the heart and major blood vessels. It uses radio waves, magnets and a computer instead of radiation. It is usually used to check the results of other tests or get clearer results. Based on your child’s age, they might have medicine to make them sleep (anesthesia) before an MRI. Learn more about cardiac MRI.

Chest X-rays are noninvasive tests that provide pictures of the heart and lungs. An X-ray is a form of energy that can pass through your child’s bone and tissue to create an image.

The radiology staff at Seattle Children’s has been trained to lower your child’s stress before, during and after tests like this by distracting your child.

Smaller bodies often need less radiation to get a good image. The dose of radiation varies with each patient and type of exam. Our team uses your child’s age and weight to set the dosage. The radiation doses we give at Seattle Children’s are consistently lower than the American College of Radiology recommends. Learn more.

Echocardiography is a test that uses ultrasound waves to make a picture of the heart. It can show how the heart is working, if there are structural problems in the heart and how blood is flowing within the heart and blood vessels. A fetal echocardiogram is an ultrasound image of an unborn baby’s heart. Learn more.

An electrocardiogram is a noninvasive test that records the electrical activity of the heart. It is used to check if the heart rate and rhythm are normal. Learn more.

During an EP study, a heart doctor (cardiologist) guides small plastic tubes (catheters) to the heart through the blood vessels of the leg to read the heart’s electrical signals. An EP study is often used to find and treat the cause of an abnormal heart rhythm. It is also sometimes used to tell if a child needs a pacemaker or defibrillator. Learn more.

An event monitor is a noninvasive test. The event monitor is a device, smaller than a deck of cards, that records the heart’s rhythm. It is used to track symptoms such as fast heart rhythms, dizziness and chest pain. When your child feels symptoms and they or you push a button on the event monitor, it records the rhythm. Learn more.

An exercise test is a noninvasive way to measure how the heart responds to work or exercise. This test can show if your child’s heart provides their body with enough blood circulation during exercise. Learn more.

A Holter monitor is a noninvasive test. It is a portable electrocardiogram that your child wears for 24 hours. It records how fast or slow the heart beats throughout the day and night while your child is playing, exercising and sleeping. It helps track symptoms such as dizziness, chest pain, fainting and fast heart rhythms or skipping beats (palpitations). Learn more.