Broad Complex Tachycardia

Question 1

What is broad complex tachycardia?

Answer 1

ECG shows rate of >100 and QRS >120 ms. If there are no clear QRS complexes, it is VF or asystole.

Question 2

Give examples of arrythmias that cause broad complex tachycardias

Answer 2

• Ventricular fibrillation
• Ventricular tachycardia
• Torsade de pointes (polymorphic VT)
• Any causes of narrow complex tachycardias when combined with bundle branch block or metabolic causes of broad QRS
• Antidromic AVRT