Effectiveness and Safety of Four Aerobic Exercise Intensity Prescription Techniques in Rehabilitation Training for Patients with Coronary Heart Disease
Table 1
Risk stratification of cardiovascular events during exercise.
Item
Risk stratification
Low-risk
Moderate-risk
High-risk
Exercise test index
Angina
No
Maybe yes
Yes
Asymptomatic, with myocardial ischemia and ECG changes
No
Maybe yes, ST segment down shift <2 mm
Yes, ST segment down shift ≥2 mm
Other obvious discomfort symptoms (e.g., dyspnea, dizziness)
No
Maybe yes
Yes
Complex ventricular arrhythmias
No
No
Yes
Hemodynamic response
Normal
Normal
Abnormal
Functional reserve
≥7METs
5.0–7.0 METs
≤5 METs
Nonexercise test index
LVEF
≥50%
40%–50%
<40%
History of sudden death/sudden death
No
No
Yes
Resting complex ventricular arrhythmias
No
No
Yes
Complications of MI or revascularization
No
No
Yes
Myocardial ischemia after MI or revascularization
No
No
Yes
Congestive heart failure
No
No
Yes
Clinical depression
No
No
Yes
All low-risk items match belong to low-risk groups; any high-risk item matches belong to high-risk group. ECG, electrocardiography. LVEF, left ventricular ejection fraction. MI, myocardial infarction.
