Which rhythm requires cardiac pacing in the context of broad complex bradycardia?

In the context of broad complex bradycardia, complete heart block is the rhythm that requires cardiac pacing. Complete heart block, also known as third-degree atrioventricular (AV) block, occurs when there is a failure of conduction between the atria and ventricles. This results in a dissociation between the electrical activity of the atria and the ventricles, leading to a slow ventricular rate that can be broad in appearance if the escape rhythm originates from a ventricle.

Cardiac pacing is indicated in complete heart block—especially if the patient is symptomatic, as this condition can lead to inadequate cardiac output and can be life-threatening. Pacing helps to restore an appropriate heart rate and synchronize the electrical activity of the heart.

The other rhythms listed do not typically require pacing in this context. In stable atrial fibrillation, while the patient may have a bradycardic rate, it usually does not necessitate immediate pacing if the heart rate remains stable and the patient is asymptomatic. Monomorphic ventricular tachycardia, while potentially concerning, typically does not fall into the bradycardic category unless an escape rhythm is present. Sinus tachycardia, by definition, involves a faster heart rate and does not require