If one have undiagnosed hypomagnesemia means shortage of magnesium and also in diagnosed total cholesterol 490 (ldl -190 ,hdl-40) and for gastric ulcer the person takes pantoprazole 40 mg daily once for continuously 3+ months then he will suffer from cardiac arrest as pantoprazole will further reduce magnesiumI. I have witnessed one such situation so asking being a layman from medical knowledge prospective.