I was diagnosed with SVT. Then, I had multiple episodes of SVT where my hr would go from normal to 200s, then down to 30s or 40s in seconds. This occurred several times a minute for several hours. The ER put me on a Holter monitor. It said I had sinus bradycardia down to 43 bmp and sinus tachycardia to 144 bpm. I also had ventricular bigemeny, trigemeny, and couplets without ventricular tachycardia. So, are the new arrythmias better or worse than the SVT? Is the treatment the same? I'm on 50mg Mepropolol twice daily. And, is it normal that my BP has actually RISEN on this medication? It used to be "normal", but now runs in the 140s over 40s.