Patients with CAD carrying the 1622 G/G genotype of the P2Y1 gene had significantly higher levels of arachidonic acid-induced platelet aggregation than noncarriers in Caucasian populations, while another study showed that P2Y1 1622A > G did not contribute to clopidogrel resistance in Indian populations [10, 22]. Here, P2RY1 is linked to coronary artery disorder.