instruction: Among patients admitted before the year 2114, calculate the total number of those who had coronary artery disease or coronary artery bypass graft with MVR maze as their primary disease
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic WHERE demographic.diagnosis = "CORONARY ARTERY DISEASE\CORONARY ARTERY BYPASS GRAFT WITH MVR; ? MAZE" AND demographic.admityear < "2114"