40 Y/o Male Was Hospitalized Morning Of Thursday 10/20 With

40 y/o male was hospitalized morning of Thursday 10/20 with atrial fib ... placed in critical care on Cardizem drip ... all blood tests normal except for magnesium (had been drinking) ... cardiac rhythm converted overnight with med ... was discharged from hospital next day on oral Carizem and aspirin once daily. Within this past hour (now & no alcolhol since 10/19) same man has projectile vomiting of dark and bright red blood and cough is bright red bloody. He has called a cab to take him to the emergency room as he is afraid this could trigger another bout of A Fib . Could this be medication related or totally unrelated? Worried Mom