my father 70 years old with the history of angioplasty at the prximal end of LAD in the yr 2002, hypertention 30 yrs, diabetes melitus 20 yrs, ckd 5 yrs, dementia and perkinsonism for 1 yrs, BPH with urinery incontinence currently suffering with anginal pain n his angiogram showed around 70% block in right coronary artery bifurcation...now my question is for him which one is suitable? ...angioplasty or bypas?