I had great respect for the CAA quacks, both at Gatwick and at Heathrow, where I had all my annual medicals.
As for the heart specialist.... well, my mother lived with us for a while when my father died. She was quite old and suffered from arthritis and other problems. One afternoon after her siesta she didn't appear at the usual time. When I checked I found her ashen, having difficulty breathing and experiencing severe chest pains. Called our GP and he attended straight away and called an ambulance saying it looked like a heart attack.
Some hours later, the hospital discharged her with 2-3 tablets..... "if it happens again, put one of these heart tablets under your tongue and take a spoonful of indigestion mixture". I kid you not!