DR. MIGUEL CASTELLANOS, M.D, P.A.
SOUTHEAST TEXAS CARDIOLOGY
610 Strickland Dr. Suite #100
Orange, Texas 77630
WHAT IS A STRESS TEST?
A stress test can be used to test for heart disease. Stress tests are tests performed by Dr. Castellanos to determine the amount of stress that your heart can manage before developing either an abnormal rhythm or evidence of ischemia (not enough blood flow to the heart muscle). The most commonly performed stress test is the exercise stress test.
TYPES OF STRESS TESTS
EXERCISE TREADMILL TEST
Exercise treadmill test is usually preferred if you can exercise adequately without discomfort or difficulty. You will start walking on a treadmill. At regular intervals, the speed and/or angle of the treadmill will increase until you achieve the right heart rate or you develop symptoms like fatigue that limit your exercise. At peak heart rate, a second dose of radioactive tracer will be injected into the IV. Your heart rate, EKG and blood pressure will be monitored throughout the test. If you are unable to achieve an adequate heart rate with exercise, medication to dilate blood vessels in the heart may be given.
MEDICATION STRESS TEST
Medication Stress Test - If you can not exercise adequately, an infusion of a medication (regadenoson / “Lexiscan”) over approximately 10 seconds is given to dilate blood vessels in the heart which is followed by injection of a second dose of a radio tracer that allows measurement of blood flow in the heart muscle by the camera. The stress test protocol takes about one minute, and you will be observed for about 5 minutes before you leave the stress testing room. If you have any undesirable side effects (shortness of breath, flushing, abdominal discomfort, headache) of the stress medication, an antidote (cola, caffeinated coffee or theophylline) can be given which usually eliminates side effects in under one minute.
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