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Listen to Nurse Bunny's heartbeat as she plays her tricuspid valve out loud using her Littmann CORE stethoscope and a bluetooth speaker. She starts by measuring her baseline BPM while sitting and wearing a surgical mask. Then she performs three exercises for 1min each while still listening to her heartbeat. She sits down and times how long before returning to baseline after each exercise. She's wearing blue bra and panties, black stethoscope, and blue surgical mask. No nudity. 4K version