High Atherogenic Index of Plasma (AIP) as a Predictor of Poor Coronary Collateral Circulation (CCC) in Patients with Chronic Total Occlusion (CTO) Luh Putu Previyanti Dharma Putri*, I Kadek Susila Surya Darma, and I Made Junior Rina Artha Abstract Background: Chronic Total Occlusion (CTO) of the coronary arteries is a