Nancy seemed to be a pretty healthy 50-year-old. She turned out to be mildly anaemic, probably because of heavy periods.

Her gynaecologist spoke to her about performing a hysterectomy.

But then she came in acutely and saw my colleague Dr Kim for chest discomfort. It was always in the same place, right sided, like a fast vibration or fluid moving inside her chest.

Dr Kim ordered a Holter monitor and made sure the gynaecologist knew we were trying to rule out something cardiac before the surgery.