question: Hi doctor, My dad recently had chest pain, we took EKG and echo and it turned out as though he had a slight abnormality. We got the angio done the reports shows: LAD: Type III LAD has 50% proximal stenosis. Mid and distal has a mild diffuse disease. RI: Has 80% proximal stenosis. LCX: Non-dominant LCX is normal. RCA: Dominant RCA has 80% proximal stenosis. Mid segment has diffuse disease. Distal segment has tandem 80% or 90% stenosis. PDA has 60% mild segment stenosis. Diagnosis: Coronary artery disease. Right dominant system. Severe RCA disease. Recommendation: PCI to RCA. I would like to know how many stents are needed on the right and what changes need to be done in the lifestyle. His bad cholesterol: 60, good cholesterol: 33, normal BP with vitamin B12 and D deficiency.