Ventricular tachycardia should be described by type (monomorphic or polymorphic), duration (sustained or non-sustained) and heart rate — i.e. monomorphic VT non-sustained at a heart rate of 220 ...

Sustained ventricular tachycardia is usually defined as VT lasing for more than 30 seconds. VT can be monomorphic (most common) or polymorphic (a.k.a. Torsades de Pointes).

The condition, also known as repetitive monomorphic ventricular tachycardia (RMVT) is usually harmless. With ventricular tachycardia, both chambers of the lower heart will beat rapidly.

(cycle length [CL] > 260 ms), monomorphic fast VT (FVT) (CL ≤ 260 ms), and polymorphic VT (PMVT)/ventricular fibrillation (VF) have not been well characterized nor compared in patients with and ...