Table A1.

Detailed criteria for distinguishing danger levels.

Danger Level	Symptoms	Clinical Indicator	Standard
Low	No angina pectoris No myocardial ischemia No complex arrhythmias No postoperative complications of PCI or CABG No anxiety or depression	LVEF > 50% METs > 7.0 cTn < 0.1 µg/L	Complies with all standards
Medium	Angina pectoris when medium-intensity exercise (5.0~6.9 METs) Myocardial ischemia when low-intensity exercise (5.0~6.9 METs) No complex ventricular arrhythmias when resting or sporting No severe psychological disorders	LVEF: 40~49% METs: 5.0~7.0 cTn < 0.1 µg/L	Does not comply with low-level and high-level
High	Angina pectoris when low-intensity exercise (<5.0 METs) Myocardial ischemia when low-intensity exercise (<5.0 METs) Complex ventricular arrhythmias when resting or sporting Combined cardiogenic shock or heart failure after PCI or CABG Severe psychological disorders	LVEF < 40% METs ≤ 5.0 cTn > 0.1 µg/L	Complies with one standard

METs, metabolic equivalents; PCI, percutaneous coronary intervention; CABG, coronary artery bypass graft; LVEF, left ventricular ejection fraction; cTn, cardiac troponin.