An echocardiogram is an ultrasound of your heart that shows how well it pumps and whether the valves are working

An echocardiogram uses sound waves to create a moving picture of your heart's chambers, valves, and blood flow. Unlike an EKG, which records electrical activity, an echo actually shows the structure and function of the heart itself. A technician spreads gel on your chest, presses a small probe called a transducer against your skin, and moves it around to capture images from different angles. The whole test takes 30 to 60 minutes and causes no pain.

The images let your doctor see whether your heart pumps with normal strength, whether the valves open and close properly, whether there is fluid around the heart, and whether the heart chambers are the right size. It can detect problems like heart failure, valve disease, irregular heartbeat patterns, and damage from a previous heart attack. Some people get an echo as a screening when they have no symptoms; others get one because they have chest pain, shortness of breath, or a heart murmur a doctor heard during a physical exam.

Key Takeaways

  • An echocardiogram is an ultrasound test that takes 30 to 60 minutes, requires no injection or radiation, and shows how your heart pumps and whether the valves work.
  • You may be asked to fast for a few hours before the test and to wear a hospital gown so the technician can place the probe on your bare chest.
  • The test is usually done in a hospital cardiology department or an outpatient imaging center, and results are available within a few days.
  • A stress echocardiogram, where you exercise or receive medication to raise your heart rate, shows how your heart performs under demand and takes longer than a resting echo.

What happens during the test

You will lie on your back or left side on an exam table. The technician will place three to five sticky patches called electrodes on your chest to monitor your heart rhythm during the scan. They will then explore warm gel to your skin and press the transducer firmly against your chest, moving it slowly to capture images of different parts of the heart. You may feel pressure but should not feel pain. The technician may ask you to take a deep breath, hold it, or roll onto your left side to get a better view.

The images appear on a monitor in the room. The technician will not tell you the results — that comes from your doctor after a cardiologist reviews the images. The test produces no radiation and no side effects. Some people feel mild discomfort from lying still for an extended period or from the pressure of the probe, but this passes when ready after the test ends.

Preparation and what to bring

Ask your doctor whether you should eat or drink before your echo. For a standard resting echocardiogram, fasting is usually not required, but some facilities ask you to avoid a large meal for a few hours beforehand. If you are having a stress echo, you may be asked to fast for four hours and to avoid caffeine for 24 hours before the test, since caffeine can affect heart rate.

Wear loose, comfortable clothing that you can remove easily from the waist up. Bring your insurance card and photo ID. If you take heart medications, ask your doctor whether to take them on the day of the test — most of the time you should, but a stress echo may require you to skip certain medications beforehand. Write down any symptoms you have been having (chest pain, shortness of breath, dizziness) and mention them to the technician when you arrive.

Resting echo versus stress echo

A resting echocardiogram shows how your heart looks and pumps when you are at rest. This is the most common type and is used to screen for structural problems, valve disease, and overall heart function. It takes 30 to 60 minutes and requires no special preparation beyond removing your shirt.

A stress echocardiogram shows how your heart performs when it is working harder. You exercise on a treadmill or stationary bike while your heart rate and blood pressure are monitored, then you move to the ultrasound table for images while your heart is still elevated. If you cannot exercise, the technician may give you medication (usually dobutamine) through an IV to simulate the effect of exercise. A stress echo takes 45 minutes to two hours and is used when a doctor suspects you may have blockages in the arteries that supply the heart, or when you have chest pain that occurs only during activity.

What the results mean

Your doctor will receive a written report from the cardiologist who reviewed your images. The report describes the size of each heart chamber, how forcefully the heart pumps (measured as ejection fraction, a percentage), whether the valves are normal, and whether there are any abnormalities. Normal results mean your heart structure and function are typical for your age and health status.

Abnormal results might show reduced ejection fraction (meaning the heart is not pumping as much blood as it should), valve leakage or narrowing, enlargement of the heart chambers, fluid around the heart, or signs of previous damage. An abnormal result does not mean you need emergency treatment — it means your doctor will discuss what it means for you specifically and what the next steps are. Some findings require medication, lifestyle changes, or further testing. Others are monitored over time with repeat echos.

Risks and limitations

A standard echocardiogram carries no significant risk. There is no radiation, no injection, and no medication. The only discomfort is usually the pressure of the probe on your chest. A stress echocardiogram carries a small risk of chest pain, irregular heartbeat, or a drop in blood pressure during the exercise or medication phase, but these are rare and medical staff are present to monitor you and respond if needed.

The main limitation of an echo is that it cannot see inside the coronary arteries themselves — it shows the effect of blockages on heart function but not the blockages directly. If your doctor suspects a blockage, they may order a cardiac catheterization or a CT angiogram to look inside the arteries. An echo also works best in people with normal body size and clear skin; obesity or certain lung conditions can make images harder to obtain.

Cost and insurance coverage

The cost of an echocardiogram varies widely depending on whether it is done in a hospital or an outpatient imaging center, your location, and your insurance plan. A resting echo typically costs between $500 and $3,000 before insurance; a stress echo costs more because it is longer and requires more staff. Most insurance plans cover an echo when a doctor orders it for a medical reason (such as evaluating chest pain or a murmur), but coverage for screening in people with no symptoms varies.

Ask your doctor's office to check your coverage before the test. If you do not have insurance, ask the imaging center about their cash-pay rates — many offer discounts for uninsured patients who pay upfront. Some community health centers offer echos at reduced cost based on income.

Frequently Asked Questions

How long does it take to get results?

The technician does not provide results on the day of the test. A cardiologist reviews the images and writes a report, which is usually sent to your doctor within one to three business days. Your doctor's office will contact you with the results and discuss what they mean.

Can I drive home after the test?

Yes, after a resting echocardiogram you can drive when ready. After a stress echo, you may feel tired or lightheaded for a short time, so it is safer to have someone else drive you home or to use a taxi or ride service.

What if the images are not clear?

Sometimes the ultrasound images are hard to see because of body size, lung disease, or scar tissue from previous surgery. If this happens, your doctor may order a different type of imaging, such as a cardiac MRI or a CT scan, which can provide clearer pictures.

Do I need to repeat the echo?

Whether you need a repeat echo depends on your results and your doctor's judgment. If results are normal and you have no symptoms, you may never need another one. If results are abnormal, your doctor may recommend a repeat echo in six months or a year to see whether the problem is stable or getting worse.

Is an echocardiogram the same as a heart ultrasound?

Yes, echocardiogram and heart ultrasound are the same thing. "Echo" is short for echocardiography. The term straightforward means using sound waves to image the heart.