Dan,point is the Asian carriers all use the same post surgical disqualication after cardiac bypass.This is frankly,outdated and already established as "questionable",if eyesight were not allowed to be "corrected" then there would be few Class1 in Asia.
Lion your heart has been "corrected" to an acceptable level and eventually the Asian carriers may well bow to science but that may well be beyond your career.
The exception may be with Japan and HK so perhaps CX and KA Cargo might be worth a go,if not you may have to take a bond onto 777 330/340.
JARs medical requirement criteria allow you to fly now,and FAR in the USA is the same,if you are stable and pass the mandatory post bypass tests inc ECG/ultrasound and treadmill-stress ECG if required I see no reason you should not continue providing you pass the tests and meet the standard.
Stay with JARs compliant med regs,carriers IMHO and take the TR/bond your 20K hours will be highly desired in EK/EY/QR/GF and others.Good luck.QB