Quaaludes were originally prescribed for things like sleeplessness and anxiety, but have since been made illegal because of their addictiveness. Methaqualone is classified as a hypnotic sedative and was originally prescribed to treat anxiety and relax muscles.uaaludes were originally prescribed for things like sleeplessness and anxiety, but have since been made illegal because of their addictiveness. Methaqualone is classified as a hypnotic sedative and was originally prescribed to treat anxiety and relax muscles.
1 Serum levels increase within 3-12 hours from the onset of chest pain, peak at 24-48 hours, and return to baseline over 5-14 days. 2  Troponin levels may not be detectable for six hours after the onset of myocardial cell injury. 3  The most sensitive early marker for myocardial infarction is myoglobin.
In the evaluation of myocardial perfusion, or blood flow through the coronary arteries, the SPECT scan may require both a resting and a stress test. The stress test is performed either by treadmill exercise or with medication if the patient cannot walk on the treadmill. The cardiac SPECT scan can identify areas of the heart which do not receive adequate blood flow during stress, called ischemia, as well as find areas of irreversibly damaged heart, or scar.