A 57-year-old man comes to the physician for a follow-up appointment. Auscultation of the chest shows a 2/6 late-peaking systolic murmur with an ejection click. An S4 heart sound is present. Which of the following additional finding is most likely to be seen in this patient?
Diffuse four-chamber dilatation with reduced ejection fraction
History of rheumatic heart disease in childhood
Hypertrophic sarcomeres laid in series
Normal pulmonary capillary wedge pressure
Preserved ejection fraction
Pulsus paradoxus