protocol for dobutaimine stress test?!
Question: Dobutamine stress test protocol
Answers:
Not certain what you want to know. I am not a doctor but this is the kind of stress test I get every year.
Dobutamine is used to increase the heart rate in patients that either are unable to walk fast enough on the treadmill or cannot get their heartrate high enough.
You lay on a table with electrodes attached and they give the dobutamine through IV. You will get out of breath as if you are running. This only lasts a short time, I think it's three minutes. The you will be taken into another room and again put on a table where a series of x-rays will be taken of your heart. There are breaks in between and it will take about 4 hours. Here is a sight that might explain with more detail. Good luck.
Other Answers:
It is recommended that B-blockers are withheld for at least 48 hrs before the test, because B-blockers reduce the inotropic and chronotropic effects of dobutamine and, therefore, may reduce the sensitivity of the technique. Dobutamine is infused through the antecubital vein starting at a dose of 10 micro g/kg/min (3-min stages), increasing by 10 micor g/kg/min every 3 min to a maximum of 40–50 micro g/kg/min. In some patients, the target heart rate (85% of the maximal heart rate predicted for age) cannot be reached at the maximal dobutamine dose, particularly in patients receiving B-blockers. In these patients, atropine should be administered at incremental doses up to 2 mg to increase the heart rate by virtue of vagolytic action, and dobutamine infusion should be continued. Heart rhythm should be monitored throughout the stress test and recovery.
Blood pressure measurements and electrocardiograph recordings should be performed every 3 min.
Criteria for termination of the test are severe chest pain, ST-segment depression > 2 mm, ST-segment elevation > 1 mm in patients without previous myocardial infarction (MI), significant ventricular or supraventricular arrhythmia, hypertension (blood pressure 240/120 mm Hg), systolic blood pressure drop of >40 mm Hg, and any intolerable side effect regarded as being the result of dobutamine (4–6). Side effects of dobutamine can be reverted by metoprolol
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