Preoperative Cardiac RiskLoading...MI within 6 moNo0Yes+10MI more than 6 mo agoNo0Yes+5Canadian Class Angina IIINo0Yes+10Canadian Class Angina IVNo0Yes+20Unstable angina within 6 moNo0Yes+10Pulmonary edema within 1 wkNo0Yes+10Pulmonary edema everNo0Yes+5Rhythm other than sinus or sinus with PACsNo0Yes+5More than 5 PVCs per minuteNo0Yes+5Suspected critical aortic stenosisNo0Yes+20Poor general medical statusNo0Yes+5Age older than 70 yoNo0Yes+5Emergency surgeryNo0Yes+10