Dobutamine Echocardiogram
About the Test
A Dobutamine Stress echocardiogram combines an ultrasound study of the heart with an exercise test. The image is displayed on a television with an echo before, and after an exercise stress test. For people who are unable to exercise adequately, this stress test is done with the injection of dobutamine, a drug that produces an effect on the heart similar to exercise. The stress dobutamine echocardiogram allows the doctor to learn which areas of the heart muscle do not receive an adequate blood supply.
The Dobutamine Echocardiogram helps to evaluate:
- Blockages in the coronary arteries (the vessels that supply blood to the heart)
- The response of the heart muscle to exercise
At Danbury Hospital, the echocardiographic information is obtained by trained ultrasound personnel and interpreted by trained specially trained physicians.
Preparation
- Do not eat or drink for 4 hours prior to the test.
- If you are a smoker, do not smoke 4 hours before the test.
- If you are currently taking any heart medications, tell your physician who orders the test. He or she may ask you to stop certain medications a day or two before the test.
- Wear a two-piece outfit, as you will need to change into a gown after you remove your clothing above the waist.
What Happens During the Test
The test is divided into three parts. First, a resting imaging echocardiographic study is done. Then, dobutamine is given slowly through an IV line, and another echo study is done while your heart is beating rapidly. Finally, you will be asked to lie on a bed or exam table. A technician will take pictures of your heart while at rest.
Dobutamine Infusion
Dobutamine is infused slowly into the vein, and the dose is increased every few minutes. Additional sets of echo images are obtained during the infusion of dobutamine and afterwards.
As dobutamine is given, it is normal to feel your heart pound for a few minutes. In addition, you may experince chest pressure, headache, dizziness, nausea and shortness of breath. Let the doctor know how you feel. These symptoms are relieved quickly when the infusion is stopped. You may be given a second drug to slow your heartbeat to a normal level.
Your heart and blood pressure are monitored during and after the infusion. The test usually ends after sufficient information is obtained. It may also be stopped when your heart beats fast enough, when the ECG shows abnormal changes, or when you experience significant symptoms.
Length of Test
You should allow 2 hours for the entire test which includes preparation, dobutamine infusion and echo imaging.
After the Test
There are no restrictions after the examination is completed and you can return to your normal activities after the test. Results are not available to you at that time. Your physician will be sent results usually within one working day.
Directions and Special Instructions: What Else Do I Need To Know?
These services are offered at: The Danbury Hospital Medical Arts Center, Danbury Hospital Cardiology Department and Southbury Cardiology. For more information, please contact: 203-739-4999.
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