Acute Aoic regurgitation is seen in all the following except:
Marfan's syndrome
Acute myocardial infarction
Bacterial endocarditis
Ankylosing spondylitis
Answer is B (Acute myocardial infarction) All options other than acute myocardial infarction are known causes for acute aoic regurgitation. Aoic regurgitation may result from Two Major Mechanisms : allow regurgitation of blood back into LV. I. By causing valvular deformities. This is the most common cause 2. By deforming the aoic root.