system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
An early systolic murmur may be caused by all of the following except
assistant
The correct answer is  Aoic stenosis is characteristically associated with a midsystolic murmur and is the most appropriate answer.Ref: Harrison's 18/e p1827-28.