1. 1st degree block. The T waves are tall in this strip. The serum potassium was elevated
2. Sinus tachycardia with unifocal PVCs every 5th beat (pentageminy)
3. Atrial flutter with 4:1 conduction
4. Normal sinus rhythm
5. NSR with 5 beat run of VT. The run of VT starts on the end of the T wave making it an R-on-T run of VT.