An echocardiogram is a test used to assess the heart's function and structures using sound waves. A Stress Echocardiogram is a test done to assess how well the heart works under stress. The stress portion of this test can be reached by either exercising on a treadmill or by using a medicine called Dobutamine.
A Dobutamine Stress Echocardiogram (DSE) may be used if you are unable to exercise on a treadmill. Dobutamine is injected into an IV in your arm. The effects of Dobutamine cause the heart to beat faster and stronger. This medication allows the heart to mimic the effects of exercise.
Frequently Asked Questions About Dobutamine Stress Echocardiogram
A DSE may be done on an outpatient basis or as part of your hospital stay. Steps may vary depending on your condition and your doctor's practices.
Generally, a DSE follows this process:
You will be asked to remove any jewelry or other objects that may interfere with the test. You may wear your glasses, dentures or hearing aids if you use any of these.
You will be asked to remove clothing from the waist up and will be given a gown to wear.
You will be asked to empty your bladder before the test.
An intravenous (IV) line will be started in your hand or arm before the test. It’s needed for injection of the dobutamine and to give you IV fluids, if needed.
You will lie on your left side on a table or bed, but may be asked to change position during the test.
You will be connected to an electrocardiogram (ECG) monitor that records the electrical activity of your heart and monitors your heart during the test using small electrodes that stick to your skin. Your vital signs (heart rate, blood pressure and breathing rate) will be monitored during the test.
The room will be darkened so that the images on the echo monitor can be seen by the technologist.
The cardiac sonographer, who performs the echo portion of the test, will place gel and a transducer on your chest. (To find out more about what an echo is, click here.) You will have images of your heart acquired before, during and after the Dobutamine injection.
A cardiologist will begin the Dobutamine infusion at a rate determined by your height and weight. The rate of the infusion will be increased every few minutes until you have reached your target heart rate (determined by the doctor based on your age and physical condition), or until the maximum dose of Dobutamine has been reached.
After the Dobutamine is started and after each increase in the Dobutamine, your blood pressure will be checked, your continuous ECG tracing will be monitored and echocardiogram images will be recorded.
Once you have reached your target heart rate or the maximum amount of the Dobutamine, the medicine will be stopped. If your heartrate fails to reach the maximum level, additional medication may be given. The cardiologist will explain this to you if this is needed.
Your heart rate, blood pressure and ECG will continue to be monitored for 10 to 15 minutes until they have returned to the baseline state. Final echocardiogram pictures will be taken.
Tell the cardiologist if you feel any chest pain, trouble breathing, sweating or heart palpitations at any time during the test.
Once all the images have been taken, the cardiac tech will wipe the gel from your chest, remove the ECG pads and take out the IV line. You may then put on your clothes.
You may go back your usual diet and activities unless the cardiologist or your ordering doctor instructs you differently.
The results of your test will be ready for your ordering doctor to view within your electronic health record by the end of the day you had your test. You should follow up with your doctor to get the results.