I haved a pt. who has been in a Torsedas rhythm for 4 days. Her cardiologist doesn't seem to be concerned but it's making me REAL nervous. This woman has 25-35 beat runs of v tach. The MD thinks it's due to her meds. Her K+ is in the 4.0 range and her Mg is around 2.0. Today she has been bouncing between v tach, sinus brady, and bigeminy. Any suggestions?