###HUMAN: what is the maximum age of patients whose death status is 0 and diagnosed with primary disease coronary artery disease\coronary artery bypass graft with mvr; ? maze?, ###ASSISTANT: SELECT MAX(demographic.age) FROM demographic WHERE demographic.expire_flag = "0" AND demographic.diagnosis = "CORONARY ARTERY DISEASE\CORONARY ARTERY BYPASS GRAFT WITH MVR; ? MAZE"