I was checking my mum and found lateral sternum. I was surprised. I've always considered her insanely healthy, and a pretty well-rounded person so asked her about heart palpitations or anything similar expecting her to say 'no.'

But instead, she said she's had progressively worsening palpitations daily for the previous three weeks that she hadn't told me about.

That was two weeks ago, and it's all been clear ever since.