instruction: provide the number of patients whose primary disease is aortic valve insuffiency\aortic valve replacement /sda and lab test abnormal status is delta?
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN lab ON demographic.hadm_id = lab.hadm_id WHERE demographic.diagnosis = "AORTIC VALVE INSUFFIENCY\AORTIC VALVE REPLACEMENT /SDA" AND lab.flag = "delta"