An echocardiogram is an ultrasound of your heart. It uses sound waves to create moving pictures of your heart’s chambers, valves, walls, and blood vessels, letting doctors see how well your heart is pumping and whether any structures look abnormal. It’s one of the most commonly ordered heart tests, and the standard version is completely noninvasive, with no radiation involved.
What It Shows
An echocardiogram gives doctors a real-time view of your heart’s structure and function. It can measure how strongly your heart squeezes with each beat, detect leaky or narrowed valves, identify thickened or thinned heart walls, spot fluid buildup around the heart, and reveal blood clots or tumors inside the heart chambers. It’s also the most sensitive tool available for detecting valve leaks.
One of the key numbers that comes from an echocardiogram is your ejection fraction, which represents the percentage of blood your heart pumps out with each contraction. A normal ejection fraction is 50% or higher. Between 41% and 49% is considered mildly reduced, and 40% or below signals significantly reduced heart function.
Beyond still images, the test uses a technology called Doppler ultrasound to measure blood flow. By comparing the frequency of sound waves sent into the body with those bouncing back, the machine can calculate how fast blood is moving and in which direction. On screen, blood flowing toward the sensor appears red and blood flowing away appears blue, with lighter shades indicating faster speeds. This color map lets doctors pinpoint exactly where blood is flowing abnormally, whether that’s a jet of backflow through a leaky valve or turbulence from a narrowed one.
Why Doctors Order One
The most common reasons include unexplained shortness of breath (especially during exertion), chest pain, palpitations, fainting or near-fainting episodes, a new heart murmur, or an abnormal electrocardiogram. Doctors also use echocardiograms to monitor conditions already diagnosed, like heart failure or valve disease, tracking whether things are stable or worsening over time.
Even without symptoms, you might be referred for one if you have a first-degree relative with certain conditions like hypertrophic cardiomyopathy (an inherited thickening of the heart muscle) or aortic aneurysm. Athletes with abnormal electrical heart readings sometimes get screened this way too.
Conditions It Can Detect
The list is long. Echocardiograms can identify or help diagnose:
- Valve disease: narrowing (stenosis) or leaking (regurgitation) of any of the heart’s four valves, including problems with replacement valves
- Heart failure: enlarged chambers, weakened pumping, or stiff heart muscle that doesn’t relax properly
- Cardiomyopathy: abnormal thickening, stretching, or stiffening of the heart walls
- Pericardial disease: fluid around the heart or a thickened, constrictive sac surrounding it
- Endocarditis: infected growths on heart valves, along with complications like abscesses
- Heart tumors and blood clots: masses inside any of the four chambers
- Congenital defects: holes between heart chambers or other structural abnormalities present from birth
Types of Echocardiograms
Transthoracic (TTE)
This is the standard version and by far the most common. A technician applies gel to your chest and moves a handheld probe across it. The probe sends sound waves through your chest wall, and the returning echoes build a live image of your heart on a monitor. It’s painless, requires no sedation, and typically takes 30 to 60 minutes. No fasting or special preparation is needed.
Transesophageal (TEE)
When standard images aren’t clear enough, doctors may use a specialized probe guided down your throat into your esophagus. Because the esophagus sits directly behind the heart, the sound waves don’t have to pass through skin, muscle, and bone, producing much sharper images. This approach is particularly useful when obesity or lung disease interferes with standard imaging, or when doctors need a detailed look at specific structures like the back side of the heart valves. You’ll be sedated for this one, and you’ll need to fast beforehand.
Stress Echocardiogram
A stress echo combines a standard echocardiogram with physical exertion to see how your heart performs under demand. Images are taken at rest and again at peak stress, then compared side by side. Doctors are looking for sections of the heart wall that stop moving normally when pushed harder, which suggests a coronary artery isn’t delivering enough blood to that area.
If you can exercise, you’ll walk on a treadmill or pedal a stationary bike with gradually increasing intensity. If you can’t exercise, a medication is given through an IV to make your heart beat faster and harder, mimicking the effects of physical activity. The whole process usually takes about an hour. Stress echocardiograms are primarily used when coronary artery disease is suspected, particularly in people with chest discomfort during exertion.
What the Experience Is Like
For a standard transthoracic echo, you’ll change into a gown and lie on an exam table, usually on your left side. The technician applies warm gel to your chest and presses the probe firmly against different spots to capture views from multiple angles. You may hear a whooshing sound, which is the Doppler picking up blood flow. Some pressure from the probe can feel uncomfortable, but it shouldn’t be painful. You can go back to normal activities immediately afterward.
A transesophageal echo is more involved. After sedation, the probe is passed through your mouth and into your esophagus. Your throat is numbed with a spray beforehand, and most people have little or no memory of the procedure. You’ll need someone to drive you home and should plan to take it easy for the rest of the day while the sedation wears off.
What Results Mean
A cardiologist reviews the images and measurements, then sends a report to the doctor who ordered the test. Normal results mean your heart chambers are the expected size, the walls are the right thickness, the valves open and close properly, blood flows in the correct direction, and your ejection fraction is healthy.
Abnormal findings vary widely in significance. A mildly leaky valve, for instance, is extremely common and often needs no treatment at all. A significantly reduced ejection fraction, enlarged chambers, or severe valve narrowing would typically prompt further testing or a treatment plan. Your doctor will interpret the results in the context of your symptoms, medical history, and other tests.
Cost Considerations
The cost of an echocardiogram varies significantly depending on where you live, the facility, and whether you have insurance. As a reference point, average charges for a standard echocardiogram in New Hampshire (based on 2023-2024 data) run around $3,400 before insurance, covering both the facility fee and the cardiologist who interprets the images. Most insurance plans cover echocardiograms when ordered for a medical reason, but out-of-pocket costs depend on your deductible and copay structure. If cost is a concern, outpatient imaging centers tend to charge less than hospital-based facilities for the same test.
Handheld and Portable Devices
A newer generation of pocket-sized ultrasound probes has made basic cardiac imaging available in settings where full-sized machines aren’t practical, like emergency rooms, rural clinics, and even ambulances. These devices connect to smartphones or tablets and cost a fraction of traditional machines. Some incorporate artificial intelligence that gives real-time feedback on image quality and can automatically estimate ejection fraction.
The tradeoff is capability. Image quality is slightly lower than standard machines, the devices can overheat after 15 to 20 minutes of continuous use, and some lack the advanced Doppler features needed to properly evaluate valve problems. They’re designed for quick, focused assessments rather than comprehensive exams. A portable scan might identify a large pericardial effusion or severely reduced heart function at the bedside, but a full echocardiogram on a standard machine remains the gold standard for detailed diagnosis.