Table 1.

Patients with high risk during cardiac rehabilitation [8]

Ischemic risk	Arrhythmia risk
Postoperative angina	Acute infarction within 6 weeks
Left ventricular ejection fraction (LVEF) <35%	Active ischemia by angina or exercise testing
NYHA grade III or IV congestive heart failure (CHF)	Significant left ventricular dysfunction (LVEF <30%)
Ventricular tachycardia or fibrillation in the postoperative period	History of sustained ventricular tachycardia
The systolic blood pressure drop of 10 mmHg or more with exercise	History of sustained life-threatening supraventricular arrhythmia
Incapable of self-monitoring	History of sudden death
Myocardial ischemia with exercise	Initial therapy of patients with automatic implantable cardioverter-defibrillator (AICD)
	Initial therapy of a patient with a rate-adaptive cardiac pacemaker