CHEST suffer from chest pain to find out if there is lung congestion or an enlarged heart. It will help evaluate the finding and prognosis of early and late mortality of myocardial infarction. In this case study Ms. Kelly presents with pulmonary vascular congestion and pulmonary edema. Fluid accumulation in the air spaces and lung parenchyma can cause impaired gas exchange and lead to respiratory failure, preventing the left ventricle of the heart from adequately removing blood from the pulmonary circulation, compromising cardiac output. This pulmonary edema can lead to respiratory failure, cardiac arrest due to hypoxia which can lead to death (Morales, Prediletto, Rossi, Catapano, Lombardi, & Rovai, 2012). The size of the heart is still normal because the cardiomediastinal contours are usually normal at the onset of myocardial infarction.2. ARTERIAL BLOOD GAS (ABG)Measures the acidity and levels of oxygen and carbon dioxide in the blood of an artery. This test is used to detect how oxygen from the lungs moves into the blood and how carbon dioxide is removed from the lungs