Cardiac Perfusion Study

A sweeping an of thallium study radio isotopic can help evaluates the perfusion of muscle of heart. The examiner injects JE.V of thallium. and executes then sweeping. Sectors ischedmiques and infarcis of muscle of heart do not take the thallium, and they appear as the cold places on sweeping. A doctor can order a test under exercise constraints with a sweeping of thallium to evaluate a patient for ischemia during the exercise. Sweepings are executed at the level of exercise maximum and 2 at 4 o'clock after the exercise.

A doctor can use the thallium of dipyridamole examines for the patients that are physically incapable to exercise. Dipyridamole simulates the exercise conditions while expanding the coronary arteries. Sweepings are executed when the arteries are expanded and 2 at 4 o'clock later.

In a sweeping of closed acquisition multiple, another sweeping radio isotopic, technetium is injected, and the heart is examined for several cardiac cycles. This test analyzes the movement of wall ventriculaire and determines the quantity of fraction it of expulsion of blood edjected of the ventricule during the contraction. In a patient with CAO, this test shows the abnormal movement and the reduced execution of the wall ventriculaire left and an expulsion fraction to the under normal one.

Using the Cardiac Levels of Troponin To Determine the Damages of myocarde

Cardiac Troponins, the proteins that regulate depending interactions of the calcium between myosin and actin, facilitate the contraction and the cardiac relaxations. These proteins have three forms: troponin C, troponin I, and the troponin T. Troponin C is found in the cardiac cells of muscle and skeletal. Troponin I and troponin T is specific to the cardiac muscle.

The studies of patients with the spectacle of pain of chest that the measures of troponin I and the levels of T of troponin can be informers more of the sensitive ones of damages of the myocarde than the measures of levels of kinase of creatine. And the levels of blood of cardiac troponin to measure are able does more identify in particular patients that to are increased the risk for the cardiac complications.

In a study of 1,404 patients with throat infection and of non-q instables it vague infarctus of the myocarde (Put), those with troponin that I level of 0.4 ng/ml or had more an in a significant way higher in the short one run risks death.

In another study, a sick others with the levels of T of LOWER troponin had improved exits in the long term. During the 4 first months of continuation, the risk of a Ml or of a death increased with the highest levels of T of troponin.