Review Question - QID 107167

A 35-year-old woman presents as a new patient to a primary care physician. She hasn't seen a doctor in many years and came in for a routine check-up. She has no specific complaints, although she has occasional shortness of breath with mild activity. On physical exam, her vital signs are as follows: HR 80, BP 110/70, RR 14. On auscultation, her lungs are clear with equal breath sounds bilaterally. When listening over the precordium, the physician hears a mid-systolic click followed by a late systolic murmur that is loudest over the apex. Valsalva increases the murmur. Which of the following is NOT a possible complication of this patient's underlying problem?