What rhythm is described as a "infinity sign" V Tach with a heart rate ranging from 150 to 200 BPM?

The description of an "infinity sign" rhythm typically refers to Torsades de Pointes, which is a form of polymorphic ventricular tachycardia characterized by a distinctive sinusoidal pattern on the ECG. This rhythm shows a rapid rate, usually between 150 and 250 BPM, and is associated with prolonged QT intervals.

In Torsades de Pointes, the "twisting of the points" appearance is a result of the alternating amplitude and the axis of the QRS complexes, effectively resembling an infinity symbol. This visual characteristic, along with the heart rate range provided, makes this choice the correct one for describing the rhythm.

While Ventricular Tachycardia also presents with rapid heart rates (usually above 100 BPM), it typically shows a more uniform appearance in the QRS complexes and does not exhibit the characteristic twisting pattern seen in Torsades de Pointes. Atrial Flutter and Supraventricular Tachycardia are associated with different visual patterns and heart rates, further distinguishing Torsades de Pointes as the most appropriate answer in this scenario.