Question

the most common cause of acute cor pulmonale is: chronic bronchitis pulmonary embolism myocardial infarction emphysema

Explanation:

Acute cor pulmonale occurs when there is sudden right - heart failure due to increased pulmonary vascular resistance. Pulmonary embolism (a blockage in the pulmonary arteries) can cause a sudden increase in pulmonary vascular resistance. Chronic bronchitis and emphysema (which are part of COPD) are more associated with chronic cor pulmonale. Myocardial infarction mainly affects the left ventricle (in most cases) and is not the most common cause of acute cor pulmonale.

Answer:

Pulmonary embolism