Cardiac Health Services

Dobutamine Cardiolyte Stress Test

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What is a Dobutamine Nuclear Stress Test?   

• This is a test that can be done on patients that:

• Cannot exercise on a treadmill at all, or adequately to achieve an age determined heart rate.
• Cannot tolerate the medication, Dipyridamole, (Persantine)
• Take theophylline, theodur, aminophylline, or are on inhalers containing these medications.
• Or are required to have this test done as a clearance for certain organ transplant protocols.

• Dobutamine is an intravenous  medication that increases heart rate and contractility, similar to the effects of exercise.
• This helps show if the heart is getting an adequate supply of blood and oxygen when it is working harder.
• Electrodes are placed on the chest, and a blood pressure cuff on one arm.
• The patient lies on a bed throughout the test.
• A registered nurse starts an IV through which the dobutamine is given.
• A cardiologist is present throughout the test and observes the patient, EKG, and blood pressure, and any possible medication related symptoms.
• Possible temporary symptoms can include chest discomfort, jittery feeling, and the sensation that your heart rate is increasing.
• After an age specific heart rate is achieved, an isotope is injected through the IV.
• After the test portion is done the patient goes to the outpatient radiology department – located on the 1st floor in the outpatient building. They have special cameras that take pictures of the circulation to the heart. The patient lies on their back with their arms over their head for 20 minutes. Two sets of pictures are taken to show the circulation to the heart at rest and with simulated effects of exercise (from the dobutamine) .The second set sometimes needs to be done the next day.
• Preparation, and the actual test take 90 minutes to two hours. The scans take an additional two hours.
• The test must be ordered by a doctor, and be scheduled.

Why is a Dobutamine Stress Test done?
This test will help the doctor evaluate the patient’s cardiac status related to:

• Irregular heart rhythms
• If there is an adequate blood and oxygen supply to the heart when it is working
• harder.
• If any symptoms develop and at what heart rate.    
• If the patient has had any heart attacks in the past.

What Preparation is Needed?

• Nothing to eat or drink including no medications after midnight – the night before the test
• Do not apply ointments, lotions, or powder to the chest area. Deodorant can be used.
• Notify your doctor if you are unable to raise your arms over your head, and maintain them in this position while lying on a bed, for 20 minutes.
• Ask your doctor how to adjust insulin and oral diabetes medications for this test.
• Wear comfortable two piece outfit.  

Registration

• Registration will occur in the Cardiac Health Services department. You will need to bring a picture ID (such as a driver’s license), insurance cards, and any paperwork from the doctor. Bring a list of the medications you take.
• Plan to arrive 60 minutes before the test to allow time for preparation.
• Enter the hospital through the Outpatient Building.
• Take the elevators to Cardiac Health Services department, which is located on the second floor.
• If you have any questions call 245-8091 or 245-8199.

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