Which is more common: SVT with wide QRS complexes or V-tach?

Which is more common: SVT with wide QRS complexes or V-tach?

• A. SVT with wide QRS complexes
• B. V-tach
• C. Normal sinus tachycardia
• D. Bradycardia with wide complexes

Answer: (B)

The question addresses the incidence of supraventricular tachycardia (SVT) with wide QRS complexes compared to ventricular tachycardia (V-tach). Ventricular tachycardia is generally more common than SVT presenting with wide QRS complexes.

V-tach is characterized by a rapid heart rate originating from the ventricles, typically producing wide QRS complexes due to the aberrant conduction pattern in the ventricles. It is a distinct and potentially life-threatening arrhythmia that can occur due to various underlying cardiac issues, such as ischemic heart disease or cardiomyopathy.

On the other hand, SVT with wide QRS complexes can occur, but it is less frequent. Wide QRS complexes in SVT often result from concurrent bundle branch block or preexisting conduction abnormalities. Overall, while both can present with wide complexes, the prevalence of V-tach in clinical practice and emergency situations is higher.

In summary, recognizing the clinical context and the typical characteristics of these arrhythmias is essential for differentiating between them, and this knowledge solidifies why V-tach is more common.