This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': "Most common cause of acute RVF aEUR' \nSelect and explain. \nA. Massive pulmonary embolism, B. Tricuspid stenosis, C. Pulmonary stenosis, D. Tricuspid regurgitation", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Massive pulmonary embolism Acute right ventricular failure is usually caused by acute cor pulmonales. Most common cause of acute cor pulmonale is pulmonary embolism. M.C. cause of chronic cor pulmonale is pulmonary embolism Causes of acute right hea failure Pulmonary embolism (M.C.) Acute respiratory failure (especially in broncho pulmonary disease with hypoxic / hypercapnic pulmonary vasoconstrictions. ARDS Sepsis Acutely exacerbated chronic (left / biventricular) hea failure Acute inferior myocardial infarction involving the R.V.', 'role': 'assistant'}]