A 72 years old man presents to the emergency department complaining of severe shortness of breath. He has long-standing poorly controlled hypertension and history of CAD and two MI. About one week before admission, he had an episode of substernal chest pain lasting aprox.30 minutes. Since then he has noted progressive shortness of breath to the point that he is now dyspneic on minimal exertion such as walking across the room. He noted a new onset of shortness of breath while lying down. He is only comfortable when propped up by three pillows. He is occasionally awakened from sleep acutely short of breath. On examination he is afebrile with a blood pressure of 160/100 mm Hg, heart rate of 108/min. respiratory rate of 22/min, and oxygen saturation of 88% on room air. He is pale, cool, and diaphoretic. Jugular venous pressure is 10 cm H2O. Chest auscultation reveals rales in both lungs to the mid lung fields. Cardiac examination is tachycardia with quibble S3 and S4. No murmurs or rubs are heard. Extremities are without edema. The ECG shows left ventricular hypertrophy and Q waves in the anterior and lateral leads, consistent with his patient’s history of hypertension and myocardial infarction. Chest x-ray film reveals bilateral fluffy infiltrates consistent with pulmonary edema. he is admitted to the ICU with diagnosis of congestive heart failure and possible myocardial infarction. ( A). what are the four factors that account for all cases of pulmonary edema ? Which are probably responsible for this patient’s pulmonary edema ? (B) How does poor cardiac function cause pulmonary edema?
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