## **Core Concept**
Ventricular tachycardia (VT) is a type of abnormal heart rhythm, or arrhythmia, that originates in the ventricles. It is characterized by a series of premature ventricular contractions (PVCs) that occur at a rate of more than 100 beats per minute. On an electrocardiogram (ECG), VT is typically identified by specific features that distinguish it from other types of arrhythmias.

## **Why the Correct Answer is Right**
The correct answer, ., represents an AV dissociation, which is a feature that can be seen in ventricular tachycardia. AV dissociation occurs when there is a disruption in the normal relationship between atrial and ventricular contractions, and it is a recognized criterion for the diagnosis of VT.

## **Why Each Wrong Option is Incorrect**
* **Option A:** - This option represents a wide QRS complex, which is a characteristic feature of ventricular tachycardia. VT typically presents with a wide QRS complex (>120 ms) because the arrhythmia originates in the ventricles and the depolarization wavefront spreads slowly through the ventricular muscle.
* **Option B:** - This option indicates a rate greater than 100 bpm, which is also consistent with ventricular tachycardia. VT by definition has a rate of more than 100 beats per minute.
* **Option D:** - This option shows a uniform QRS morphology, which is another feature that can be seen in VT, particularly in cases of monomorphic VT.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that the presence of AV dissociation, where P waves are seen at a different rate than QRS complexes, is highly suggestive of VT. This feature can help differentiate VT from other wide complex tachycardias, such as supraventricular tachycardia (SVT) with aberrancy.

## **Correct Answer: .**