40. COMPLIANCE WITH THE USE OF VITAMIN K ANTI-COAGULANT DRUGS IN PATIENTS AFTER MECHANICAL HEART VALVE REPLACEMENT SURGERY AT THE CARDIOLOGY CLINIC, DA NANG HOSPITAL. YHCĐ 2025, 66 (CĐ10-HNKH Trường ĐH Phenikaa). https://doi.org/10.52163/yhc.v66iCD10.2647.