The Heart Murmur No One Else Could Hear

Dr. Rachel Nguyen still remembers her third week of clinical rotations at Johns Hopkins. Her attending physician, Dr. Owens, pressed a stethoscope to a patient's chest and asked, "What do you hear?" Rachel listened. She heard a heartbeat — steady, normal. Nothing unusual. Dr. Owens shook his head. "Listen again." Rachel tried a second time. Just a heartbeat. On the third attempt, Dr.…