Outpourings of the heart

The numbers invite awe: three billion beats in a lifetime; 100,000 miles of vessels. But on the hospital floor, wonder is often in short supply. Doctors forget how intimate their examinations and investigations can be. Stethoscope to chest. Order a blood test.

I remember on a morning ward round at medical school, our consultant wanted to check that the oximeter was working (a device which measures heart rate and blood oxygenation through the nail bed). He asked a harassed junior doctor to present her forefinger. The screen’s digits betrayed her stress levels. She was clinically tachycardic. Her pulse was so fast it would have been worrying had it been the patient’s. I have not forgotten this uninvited invasion of her heart. Although we now know that Galenic humours aren’t to be found in blood, and that the heart is not the seat of emotion, they remain physiological sources where our feelings and life stories can be read.