Echocardiogram (Echo)
An echocardiogram is a heart imaging test that uses ultrasound to create real-time pictures of the heart. It shows how the heart looks, how it moves, and how blood flows through it.
Doctors use it to diagnose heart disease, monitor known conditions, and evaluate symptoms like chest pain, shortness of breath, and fatigue. It is noninvasive, painless, and involves no radiation.
If your doctor has ordered an echocardiogram, this guide explains what to expect, what the test can find, and how to understand your results.
What Is an Echocardiogram?
An echocardiogram uses high-frequency sound waves to produce images of the heart. A device called a transducer sends sound waves into the chest. Those waves bounce off heart structures and return to the transducer. The machine converts those returning signals into images displayed on a screen in real time.
This is why the test is called an echo. The images are created from the echoes of sound waves reflecting off the heart.
The test shows the size and shape of the heart chambers, how well the heart muscle contracts, how blood moves through the heart and valves, and whether any structural problems are present.
It is one of the most important tools in cardiovascular medicine. At the BaleDoneen Method, cardiac imaging including echocardiography plays a role in understanding the full picture of a patient’s heart health.
Why Is an Echocardiogram Done?
Doctors order echocardiograms for several reasons.
Evaluating Symptoms
Common symptoms that prompt an echocardiogram include chest pain, shortness of breath, unexplained fatigue, dizziness, palpitations, and swelling in the legs. See warning signs and symptoms that may indicate a heart problem.
An echocardiogram helps determine whether a structural or functional heart problem is the cause. Symptoms in women can present differently and are worth reviewing at symptoms in women.
Diagnosing Heart Conditions
Echocardiograms are used to diagnose heart failure, valve disease, cardiomyopathy, congenital heart defects, and pericardial disease. They give doctors a direct look at heart structure and function that no other noninvasive test provides.
Monitoring Known Heart Disease
For patients already diagnosed with a cardiac condition, regular echocardiograms track whether the disease is stable, improving, or getting worse. They guide decisions about medication changes, procedures, and timing of surgery.
Assessing Heart Function After Heart Attack
After a heart attack, an echocardiogram measures how much damage occurred to the heart muscle. It assesses ejection fraction and identifies complications such as wall motion abnormalities or pericardial fluid.
What Can an Echocardiogram Detect?
Echocardiograms can identify a wide range of conditions.
Heart failure is one of the most common diagnoses made with echo. Reduced pumping ability and enlarged chambers are visible findings that confirm the diagnosis and guide treatment.
Heart valve disease including regurgitation, stenosis, and prolapse is clearly visible on echo. The test shows exactly which valve is affected and how severely. Learn more about heart valve regurgitation.
Cardiomyopathy refers to disease of the heart muscle itself. Echo distinguishes between dilated cardiomyopathy, hypertrophic cardiomyopathy, and ischemic cardiomyopathy based on muscle appearance and function.
Congenital heart defects such as holes between heart chambers or abnormal vessel connections are detected. Echo is essential in evaluating structural heart defects.
Blood clots inside the heart chambers can be identified, particularly in patients with atrial fibrillation or prior heart attack.
Pericardial effusion is fluid around the heart. Echo is the most sensitive test for detecting it and assessing whether it is causing compression, a condition called cardiac tamponade.
Pulmonary hypertension, enlarged heart chambers, reduced pumping function, and heart tumors can all be detected or suggested by echocardiographic findings.
Types of Echocardiograms
Different types of echo tests are used depending on what information is needed.
| Type | How It Works | Primary Use |
| Transthoracic (TTE) | External transducer on chest | Routine cardiac assessment |
| Transesophageal (TEE) | Probe passed into esophagus | Detailed valve and clot imaging |
| Stress Echo | Echo before and after exercise or medication | Coronary artery disease detection |
| Doppler Echo | Blood flow analysis added to imaging | Valve function and pressure assessment |
| 3D Echo | Advanced three-dimensional imaging | Surgical planning, structural disease |
Transthoracic Echocardiogram (TTE)
TTE is the most common type. A transducer is placed on the chest and moved to different positions to capture images from multiple angles. It is completely noninvasive and is the standard starting point for most cardiac evaluations.
Transesophageal Echocardiogram (TEE)
TEE passes a thin probe down the throat into the esophagus, which sits directly behind the heart. This position produces much clearer images, particularly of the back chambers and valves. It requires sedation and is used when TTE images are insufficient or when very detailed valve and clot assessment is needed.
Stress Echocardiogram
A stress echo combines exercise or medication-induced heart rate increase with echocardiographic imaging before and after stress. It detects wall motion abnormalities that appear during stress and indicate reduced blood flow from coronary artery disease.
Doppler Echocardiogram
Doppler technology measures the speed and direction of blood flow through the heart and valves. It is incorporated into most modern echo studies and is essential for assessing valve function, cardiac output, and chamber pressures.
3D Echocardiography
Three-dimensional echo creates volumetric images of the heart. It is particularly useful for surgical planning in valve disease and for precise measurement of chamber volumes.
How an Echocardiogram Is Performed
Before the Test
For a standard TTE, no special preparation is needed. Continue your regular medications unless your doctor advises otherwise. Wear comfortable clothing that allows easy access to the chest.
For a TEE, you will need to fast for several hours beforehand. Sedation is used, so you will need someone to drive you home. Tell your doctor about any swallowing problems or esophageal conditions.
For a stress echo, avoid heavy meals for at least two hours before. Wear comfortable clothing and shoes suitable for walking on a treadmill. Your doctor may ask you to hold certain heart medications before the test.
During the Test
You will lie on an examination table, usually on your left side. Electrodes are placed on your chest to monitor heart rhythm throughout the procedure.
A technician applies clear gel to your chest. This helps the transducer make firm contact and allows sound waves to pass through without air interference. The transducer is moved across different areas of the chest to capture images from multiple angles.
You may be asked to hold your breath briefly at certain points to improve image quality. The process is painless. You may feel slight pressure from the transducer but nothing more.
After the Test
For a standard TTE, you can return to normal activities immediately. No recovery time is needed.
After a TEE, you will need to rest until the sedation wears off, usually one to two hours. Your throat may feel slightly sore. Do not drive until the following day.
After a stress echo, rest until your heart rate and blood pressure return to baseline. Report any chest pain, dizziness, or unusual symptoms to the testing team immediately.
| Test Type | Typical Duration |
| Standard TTE | 30 to 45 minutes |
| TEE | 60 to 90 minutes |
| Stress Echo | 45 to 60 minutes |
| 3D Echo | Similar to TTE |
Understanding Echocardiogram Results
Results are reviewed by a cardiologist and shared with your referring doctor. Always discuss findings with your physician rather than interpreting them alone.
Normal Results
Normal results show heart chambers of appropriate size, valves that open and close fully without leakage, smooth and coordinated heart wall motion, adequate blood flow, and a normal ejection fraction.
Ejection Fraction
Ejection fraction (EF) is one of the most important measurements from an echocardiogram. It measures what percentage of blood is pumped out of the left ventricle with each beat.
| Ejection Fraction | Interpretation |
| 55 to 70% | Normal |
| 41 to 54% | Mildly reduced |
| 30 to 40% | Moderately reduced |
| Below 30% | Severely reduced |
A reduced ejection fraction indicates the heart is not pumping efficiently. This is a key finding in heart failure and ischemic cardiomyopathy.
Abnormal Results
Abnormal findings may include reduced wall motion in specific segments, indicating prior heart attack or reduced blood flow. Enlarged chambers suggest pressure or volume overload. Thickened walls may indicate hypertrophic cardiomyopathy or long-standing high blood pressure. Valve abnormalities show as regurgitation, stenosis, or prolapse. Fluid around the heart points to pericarditis or other inflammatory conditions. Learn more about pericarditis and its cardiac implications.
Valve Function Findings
Regurgitation means a valve leaks and allows blood to flow backward. Stenosis means a valve is too narrow and restricts forward flow. Prolapse means a valve leaflet bulges back into the previous chamber. Each finding is graded by severity and guides treatment decisions.
Echocardiogram vs ECG (EKG)
These two tests are often confused. They measure very different things.
| Feature | Echocardiogram | ECG / EKG |
| Technology | Ultrasound imaging | Electrical signal recording |
| Shows | Heart structure and function | Heart rhythm and electrical activity |
| Imaging | Yes | No |
| Detects valve disease | Yes | Limited |
| Detects arrhythmias | Limited | Yes |
| Measures heart motion | Yes | No |
| Pain or discomfort | None | None |
| Duration | 30 to 90 minutes | 5 to 10 minutes |
An electrocardiogram tells you about the electrical system of the heart. An echocardiogram tells you about its physical structure and pumping function. Most cardiac workups use both. They provide complementary information that together give a more complete picture of heart health.
For patients with known arrhythmias or AFib, the ECG identifies the rhythm problem. The echocardiogram then assesses whether that rhythm problem has affected heart function over time.
Risks, Safety, and Cost
Is an Echocardiogram Safe?
Standard TTE is one of the safest medical tests available. It uses no radiation and involves no injections or incisions. There are no known risks from the sound waves used in diagnostic ultrasound.
Risks of TEE
TEE carries slightly more risk due to sedation and the passage of the probe. Possible side effects include a sore throat, nausea from sedation, and in very rare cases, esophageal injury. Serious complications are uncommon. Patients with known esophageal disease require extra caution.
Risks of Stress Echo
Stress echocardiography carries a small risk of exercise-induced arrhythmia or chest discomfort. Testing is always performed with monitoring equipment and trained staff present. Serious complications are rare.
Cost
Echocardiogram costs vary by location, setting, and insurance coverage.
| Setting | Typical Cost Range |
| Standard TTE | $500 to $3,000 |
| Stress Echo | $800 to $4,000 |
| TEE | $1,500 to $5,000 and above |
Most insurance plans cover echocardiograms when ordered for a medically necessary reason. Out-of-pocket costs depend on your deductible and copay. Hospital-based testing typically costs more than outpatient imaging centers. Ask your provider about cost estimates before scheduling.
Limitations
Standard echo may produce lower quality images in patients with obesity, emphysema, or a broad chest wall. In these cases, TEE or contrast agents may improve image quality. Echocardiography does not directly visualize the coronary arteries. For coronary artery assessment, cardiac catheterization or CT angiography is needed.