Provided is an ECG image of Ventricular tachycardia. Identify the wave pattern and describe it.

Choice A rationale Ventricular tachycardia is characterized by rapid, repetitive firing from an ectopic focus or reentrant circuit within the ventricular myocardium. Because the impulse does not follow the rapid His-Purkinje system, ventricular depolarization is slow and inefficient, resulting in QRS complexes wider than 0.12 seconds. The high rate, typically 100 to 250 beats per minute, overrides the sinus node, meaning P waves are buried or dissociated. This severely compromises cardiac output due to reduced filling time. Choice B rationale Chaotic electrical activity without any identifiable QRS complexes describes ventricular fibrillation. In this state, the ventricles merely quiver and do not provide any effective contraction or cardiac output. This is a pulseless rhythm that requires immediate defibrillation to restore organized activity. While ventricular tachycardia is also dangerous, it maintains organized QRS complexes, whereas fibrillation is a total loss of electrical and mechanical organization, appearing as a wavy or jagged baseline on the ECG. Choice C rationale Early P waves with a different shape followed by a normal QRS are known as premature atrial contractions. These occur when an irritable focus in the atrium fires before the next expected sinus impulse. The resulting QRS is usually narrow because the impulse still travels through the normal ventricular conduction system. This is a common, often benign finding and does not resemble the wide, rapid, and potentially lethal ventricular complexes seen in tachycardia. Choice D rationale A progressive lengthening of the PR interval until a QRS complex is dropped is the hallmark of Mobitz Type I or Wenckebach second-degree heart block. This occurs due to a delay at the atrioventricular node that worsens with each beat until conduction fails entirely for one cycle. This is an atrial-ventricular conduction issue, not a primary ventricular arrhythmia. Ventricular tachycardia does not involve PR interval cycles as the ventricles are firing independently.