Normal Sinus Rhythm Obscured By Artifact

The spectrum of ventricular tachycardia (VT) includes monomorphic and polymorphic VT. Torsades de pointes (TdP) is the specific polymorphic VT with associated long QTC interval. Presence of sinus rhythm or a QRS complex in even a single electrocardiogram (ECG) lead excludes TdP, but may not be readily apparent.
Source: The Journal of Emergency Medicine - Category: Emergency Medicine Authors: Tags: Visual Diagnosis in Emergency Medicine Source Type: research