The rate of chest pain grade of CCS 1, respectively, was (2%), CCS 2 (26%), The rate of heart failure (64%), in which NYHA II accounted for the highest rate (51.9%).
Tỷ lệ phân độ đau ngực lần lượt CCS 2 (28%); CCS 3 (66%); CCS 4 (6%).