Stress Echocardiography: Seeing Your Heart in Action

At IPMC in Northeast Philadelphia, we offer stress echocardiography in our dedicated cardiology center with experienced cardiologists and a patient-friendly environment.

What Is a Stress Echocardiogram?

During a stress echo, ultrasound images (echocardiograms) of your heart are captured at two key time points: at rest and immediately after peak exercise (or peak pharmacological stress). By comparing these two sets of moving images side-by-side, your cardiologist can see whether all areas of your heart muscle contract normally under stress or whether certain segments “lag behind” or fail to thicken properly — a sign of inadequate blood flow (ischemia).

This test does not use radiation, making it an excellent alternative to nuclear stress testing for many patients. It also provides valuable information about heart valve function, heart chamber sizes, and overall pumping strength (ejection fraction) that a nuclear stress test does not.

Why Would Your Doctor Order a Stress Echo?

Your doctor may recommend a stress echocardiogram to:

• Evaluate chest pain or shortness of breath that occurs with physical activity
• Diagnose coronary artery disease (CAD) — blocked or narrowed arteries supplying the heart
• Assess how well your heart pumps under stress — measuring changes in ejection fraction and wall motion
• Evaluate heart valve function during exercise — some valve problems (like mitral regurgitation or aortic stenosis) may worsen with activity
• Determine safe exercise levels after a heart attack, heart surgery, or angioplasty/stent placement
• Guide treatment decisions — the results help your doctor decide between medical management and interventional procedures (like catheterization or bypass surgery)
• Evaluate exercise capacity for pre-surgical risk assessment
• Assess the significance of a known coronary blockage — not all blockages cause symptoms or reduced blood flow

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What Happens During a Stress Echo?

1. Resting images. You’ll lie on your left side on an exam table. A sonographer applies gel to your chest and uses a transducer to capture ultrasound images of your heart from multiple angles. These baseline images show how your heart is functioning at rest.
2. Exercise. You’ll move to a treadmill. ECG electrodes monitor your heart rhythm, and a blood pressure cuff tracks your blood pressure throughout. The treadmill speed and incline increase gradually (typically using the Bruce protocol) until you reach your target heart rate (85% of your age-predicted maximum) or develop symptoms. You’ll be encouraged to exercise as long as you safely can.
3. Peak stress images. Immediately after you stop exercising (within 60-90 seconds — timing is critical), you’ll quickly return to the exam table and lie on your left side. The sonographer rapidly captures another set of echocardiogram images while your heart rate is still elevated. This “window” of elevated heart rate closes quickly, so the transition from treadmill to table needs to happen fast.
4. Comparison. Your cardiologist reviews the rest and stress images side by side, comparing the motion and thickening of every segment of the heart muscle wall. Normal segments contract more vigorously during stress; ischemic segments show reduced or absent wall motion during stress that was normal at rest.

The appointment typically takes 60 to 90 minutes total. If you cannot exercise, a pharmacological stress echo using dobutamine (which makes the heart beat faster and harder) can be performed instead.

After Your Stress Echo

You can resume normal activities the same day. No radiation exposure means no special precautions. A cardiologist will interpret the results and send a report to your referring doctor, who will discuss the findings and any recommended next steps.