###HUMAN: give me the number of patients whose year of birth is less than 2182 and procedure short title is coronar arteriogr-1 cath?, ###ASSISTANT: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN procedures ON demographic.hadm_id = procedures.hadm_id WHERE demographic.dob_year < "2182" AND procedures.short_title = "Coronar arteriogr-1 cath"