The lexiscan stress test is a stress test for patients who cannot walk on a treadmill. The tracer (cardiolite) is utilized. Images are obtained before the lexiscan is infused and after the lexiscan is infused. This helps to determine if areas of the heart are receiving enough blood or if there are blockages (coronary artery disease).
The patient will receive an IV to allow the injection of the tracer. There will be a wait of approximately an hour to an hour and a half before the first images are taken. Patients will then have electrodes (patches) placed on the chest. Several EKGs will be obtained. The patient will receive the medication lexiscan through the IV, replacing the exercise portion of the test. The lexiscan is injected into the IV. This is followed by an injection of the tracer via of the IV. Images will be obtained an hour and a half after the cardiolite injection. The medication lexiscan will dilate the heart’s arteries. If the heart’s arteries are healthy they will dilate more than arteries that are not healthy. The patient may feel flushed, chest pressure or pain, shortness of breath, and or headache.
It is important to follow the preparation of the lexiscan/cardiolite stress test. For 24 hours before the test the following cannot be taken: coffee, tea, colas, chocolates or candies, frosting, cookies, pies, cocoa, milk that contains chocolate, aspirin products that contain caffeine such as Anacin or Excedrin, persantin (dipyridamole), theophylline or theophylline containing products such as Constant-T, Primatene, Quibron, Slo-phylline, Theo-dur and aggrenox. Drinks cannot be taken if they are labeled “ Caffeine free” or “decaffeinated”. It is important not to have any caffeine 24 hours before the test. The patient may not eat or drink after midnight. 4-6 hours should be allowed for this test. A physician will read the test.
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