Which characteristic is a main difference between V-Tach and other tachycardias like A-Tach or PSVT?

The primary distinguishing feature of Ventricular Tachycardia (V-Tach) is that it typically presents with a wide QRS complex on the electrocardiogram (ECG). This characteristic occurs because the electrical impulses originate in the ventricles rather than the atria, leading to a slower depolarization process compared to tachycardias that originate from the atria or other parts of the conduction system. In contrast, atrial tachycardia (A-Tach) and paroxysmal supraventricular tachycardia (PSVT) usually exhibit narrow QRS complexes, as they stem from the atrial tissue and follow a more normal conduction pathway through the ventricles.

This wide QRS complex in V-Tach is significant because it can indicate a more serious cardiac issue that requires immediate attention. Recognizing this characteristic helps healthcare professionals differentiate V-Tach from other forms of tachycardia, which is crucial for appropriate management and treatment.