A Case of a Not-So-Benign Murmur

A 72-year-old woman presented to the hospital with lower extremity swelling for the previous few months. During her hospitalization, cardiac auscultation revealed a loud systolic murmur in the upper sternal borders. No diastolic murmur was appreciated. The patient reported being told she had a murmur for many years but that it was a benign murmur. She reported being relatively sedentary and did not report any increasing shortness of breath. As part of her workup, she underwent a transthoracic echocardiogram and subsequent cardiac magnetic resonance imaging (MRI).

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Based on the above information, which of the following is true?

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