In addition to 'Ventricular flutter', there may be other similar symptoms or signs that better match your side effect. These have also been listed below for your convenience.

The ventricular rate is frequently elevated and regular ― the latter of which is an important factor that allows for differentiation between atrial flutter and atrial fibrillation.

If so, the QRS complexes and the flutter waves would maintain a fixed relationship. That is not happening here. It is also not ventricular tachycardia because the narrow QRS complexes march through.

Patient 3 had ventricular flutter CL 180 ms induced by two ES (EPS terminated after two ES on the first and second PVS) and re-presented with spontaneous VT which self-terminated (without syncope).

Ventricular tachycardia, ventricular fibrillation or ventricular flutter occurred in 9 patients receiving carvedilol (0.9%) and 38 patients receiving placebo (3.9%), respectively (P <0.0001).

Cite this article McCullough, P., Wase, A. Do implantable cardioverter-defibrillators improve survival in dialysis patients after cardiac arrest?. Nat Rev Nephrol 2, 70–71 (2006). https://doi ...