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Table 1 Definition of study groups

From: Delay in admission for elective coronary-artery bypass grafting is associated with increased in-hospital mortality

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)