I found this very interesting article in the copy of Mail on Sunday.
"When the heart muscles begin to strain, larger amounts of the protein – brain natriuretic peptide (BNP) – are released by the heart and it is detectable in the bloodstream."
New £15 blood test flags up heart disease at an earlier stage than ever before... and it's 98% accurate
•Test examines blood for protein that helps regulate blood pressure and fluid around heart
•Results available within three days - so patients no longer face agonising wait to be referred to specialist clinic for scans.
•Of 7m Britons with cardiovascular disease, more than half a million will suffer heart failure
•George Michael was reported to have been suffering from a form of heart failure when he died suddenly in 2016