instruction: give me the number of patients whose primary disease is st elevated myocardial infarction\cardiac cath and drug route is iv drip?
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN prescriptions ON demographic.hadm_id = prescriptions.hadm_id WHERE demographic.diagnosis = "ST ELEVATED MYOCARDIAL INFARCTION\CARDIAC CATH" AND prescriptions.route = "IV DRIP"