Table 1.

Definition of study groups

Group	Target Time for Surgery	Anginal Symptoms, Coronary Anatomy, and Left Ventricular Function
Semi-urgent	6 weeks	Patients with either persistent unstable angina or stable angina and extensive coronary artery disease (left-main stenosis more than 50%, triple-vessel disease, or double-vessel disease with significant proximal left anterior descending stenosis and impaired left ventricular function)
Non-urgent	12 weeks	Stable symptomatic patients with limited coronary artery disease (double-vessel disease with no lesion in the proximal left anterior descending artery and normal left ventricular function or single-vessel disease with significant stenosis of the proximal left anterior descending artery)