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Stress Testing

Your doctor may ask for a stress test to find out how well your heart is working. A scan, called a stress echocardiogram, records what happens to your blood flow as your heart pumps faster and harder and transmits this information into computerized images. Results can reveal possible problems within the arteries, such as narrowing or blockages from plaque or scar tissue, or structural issues such as a faulty heart valve.

First, an ultrasound technician will take a scan of your chest using a wand-shaped device (transducer) while you’re at rest and lying on your left side.

Next, you’ll have electrodes placed on your chest, arms and legs that monitor your blood pressure and heart rhythm. Then you’ll walk or slowly jog on a treadmill or pedal an exercise bike for 5 to 15 minutes. If you’re unable to walk or pedal, you’ll receive an injected medication, dobutamine, to increase your heart rate. This is called a dobutamine stress echocardiogram.

If you’re on a treadmill or bike, your doctor will instruct you to stop once you’ve reached a target heart rate, you become too tired to continue or you experience any pain or abnormal blood pressure readings.

Nuclear Stress Testing

Your doctor may alternately suggest a nuclear stress test, which uses an injected radioactive dye to view your heart arteries’ blood flow. You’ll receive the dye during the resting portion of the test, and again after you’ve exercised. If you are unable to exercise, an IV will be placed and a medication will be given to help detect regions of reduced blood flow.

After each injection, you’ll undergo a noninvasive scan — either a cardiac SPECT (single photon emission computed tomography) or cardiac PET (positron emission tomography) — in a doughnut-shaped scanner, which transmits images of the dye moving through your arteries to a computer. This way your doctor can see healthy and damaged heart structures to help determine the best treatment course.

Chat with a Referral Specialist Monday - Friday, 8:00 am – 5:00 pm PDT

Or call (888) 834-1788.

Related Content

  • Echocardiography
  • Heart and Vascular Services
  • Cardiovascular Imaging and Diagnostic Services

Doctors at Palo Alto Medical Foundation

The following doctors are part of the Sutter Health network. Learn about the doctors on this site.
Simon G. Ermakov, M.D.

Simon G. Ermakov, M.D.

  • Cardiovascular Disease

Donald A. St. Claire, Jr., M.D.

Donald A. St. Claire, Jr., M.D.

  • Interventional Cardiology

  • Cardiovascular Disease

Roger A. Winkle, M.D.

Roger A. Winkle, M.D.

  • Cardiovascular Disease

Amin Manuchehry, M.D., FACC, FSCAI

Amin Manuchehry, M.D., FACC, FSCAI

  • Interventional Cardiology

Nellis A. Smith, M.D.

Nellis A. Smith, M.D.

  • Cardiovascular Disease

Cheena Ramrakhiani, M.D.

Cheena Ramrakhiani, M.D.

  • Cardiovascular Disease

Ryan Brandt, M.D.

Ryan Brandt, M.D.

  • Cardiovascular Disease

Michael A. Ruder, M.D.

Michael A. Ruder, M.D.

  • Cardiovascular Disease

Fahd N. Yunus, M.D., FACC

Fahd N. Yunus, M.D., FACC

  • Cardiovascular Disease

View All Related Doctors

Services Near You

Redwood City Vascular Surgery

Redwood City Vascular Surgery

2900 Whipple Avenue

Suite 225

Redwood City, CA 94062

(650) 366-0225

Fremont Center

Fremont Center

3200 Kearney Street

Fremont, CA 94538

(510) 490-1222

Dublin Center

Dublin Center

4050 Dublin Blvd.

Dublin, CA 94568-3112

(925) 875-6100

Palo Alto - 87 Encina Building

Palo Alto - 87 Encina Building

87 Encina Avenue

Palo Alto, CA 94301

(650) 853-2975

East Palo Alto Care Center

East Palo Alto Care Center

1950 University Avenue

East Palo Alto, CA 94303

Palo Alto Center

Palo Alto Center

795 El Camino Real

Palo Alto, CA 94301

(650) 321-4121

Santa Cruz Center

Santa Cruz Center

2025 Soquel Avenue

2nd Floor

Santa Cruz, CA 95062

San Carlos Center

San Carlos Center

301 Industrial Road

San Carlos, CA 94070

(650) 321-4121

Mountain View Center

Mountain View Center

701 East El Camino Real

Mountain View, CA 94040

(650) 934-7000

View All Related Locations

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