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Stress echocardiography

 

Definition

Stress echocardiography is a test that uses ultrasound imaging to determine how the heart muscles respond to stress. It is mainly used to diagnose and evaluate coronary artery disease.

Alternative Names

Echocardiography stress test; Stress test - echocardiography

How the test is performed

A stress echocardiogram includes the following steps:

  • A resting echocardiogram will be done first.
  • You will exercise or be given medicine until you reach the target heart rate. This helps reveal how your heart works when you are active.
  • Your blood pressure and heart rhythm (ECG) will be monitored throughout the procedure.
  • Ultrasound images will be recorded during the procedure.
  • Another echocardiogram is taken immediately after your target heart rate has been reached.
  • The ultrasound images will reveal any parts of the heart that may not be receiving enough blood or oxygen because of blocked arteries.

This test differs from an exercise stress test, which does not use ultrasound images.

How to prepare for the test

Ask your health care provider if you should take any of your routine medicines on the day of the test (especially if you are taking heart medication). Some medicines may interfere with test results.

Do NOT eat or drink for at least 3 hours before the test.

Wear loose, comfortable clothing. You will be asked to sign a consent form before the test.

How the test will feel

Electrodes (conductive patches) will be placed on your chest, arms, and legs to record the heart's activity. The preparation of the electrode sites on your chest may produce a mild burning or stinging sensation.

The blood pressure cuff on your arm will be inflated every few minutes, producing a squeezing sensation that may feel tight. Baseline measurements of heart rate and blood pressure will be taken before you start exercising.

You will start walking on a treadmill or pedaling a stationary bicycle. The pace and incline of the treadmill will gradually be increased.

If you are not able to exercise, you will receive a medication such as dobutamine through a vein (intravenous line). This type of medicine is given to increase your heart rate to a certain level. You may feel your heart beating more rapidly and forcefully.

Rarely, people experience chest discomfort, palpitations, dizziness, or shortness of breath during the test.

Why the test is performed

The test is performed to see whether your heart muscle is getting enough blood flow and, therefore, enough oxygen when it is working hard (under stress). The purpose is to discover and potentially treat any blockage or disease before serious or life-threatening problems develop.

Your doctor may request this test if you:

  • Have new symptoms of angina or chest pain
  • Have angina that is becoming worse
  • Have recently had a heart attack
  • Are at high risk for heart disease (before having surgery or when beginning an exercise program)
  • Have heart valve problems
Normal Values

What abnormal results mean

What the risks are

The risks are very low, and health care professionals will monitor you during the entire procedure. Rare complications include:

Special considerations

A stress echocardiogram is a very effective, noninvasive test that can help determine whether you have blockages in your coronary arteries. If there are blockages, it can determine the severity of the problem. Early diagnosis and monitoring of heart disease allows treatment to begin early.

This test does not require any radiation.

References

Fleisher LA, Eagle KA. Anesthesia and noncardiac surgery in patients with heart disease. In: Libby P, Bonow RO, Mann DL, Zipes DP. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 8th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 80.


Review Date: 4/23/2009
Reviewed By: Steven Kang, MD, Division of Cardiac Pacing and Electrophysiology, East Bay Arrhythmia, Cardiovascular Consultants Medical Group, Oakland, CA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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