Table 1. – Clinical risk stratification of patients undergoing outpatient cardiovascular rehabilitation.
| Risk | High | Intermediate | Low |
|---|---|---|---|
|
| |||
| Features | |||
| Cardiovascular event, cardiovascular intervention, or clinical decompensation | Less than 8 to 12 weeks | 12 weeks or longer | 6 months or longer |
| Physical functioning | TMET: < 5 MET CPET: Weber C/D or VO 2 peak < 60% of predicted | TMET: 5–7 MET CPET: Weber B or VO 2 peak 60–85% of predicted | TMET: > 7 MET CPET: Weber A or VO 2 peak > 85% of predicted |
| Signs and symptoms of myocardial ischemia (ischemic threshold) | At low loads TMET: at < 6 MET CPET: at < 15 ml.kg -1 .min -1 | TMET: at > 6 MET CPET: at > 15 ml.kg -1 .min -1 | Absent |
| Symptoms | HF: NYHA III and IV Angina: CCS III and IV | HF: NYHA I and II Angina: CCS I and II | Absent |
| Other clinical features: | Dialytic CKD; oxygen desaturation on exertion; complex ventricular arrhythmia. | At clinician’s discretion and judgment during pre-exercise evaluation | At clinician’s discretion and judgment during pre-exercise evaluation |
CCS: Canadian Cardiovascular Society; CKD: chronic kidney disease; CPET: cardiopulmonary exercise test; HF: heart failure; MET: metabolic equivalent; NYHA: New York Heart Association functional class; TMET: treadmill exercise test; VO 2: oxygen consumption.