Which pacing mode is appropriate for a postoperative CABG patient with atrial fibrillation and a low ventricular rate?

In the context of a postoperative CABG patient with atrial fibrillation and a low ventricular rate, the VVI pacing mode is appropriate due to its specific function in managing bradycardia and ensuring adequate heart rate. VVI pacing stands for "Ventricular Inhibition," which means that the pacemaker senses the patient’s intrinsic ventricular activity and provides pacing only when necessary.

In cases where the heart rate is slow and there is a lack of effective atrial contraction—common in atrial fibrillation—the VVI mode allows for effective management without imposing atrial pacing, which could be counterproductive. This is particularly relevant postoperatively, as the patient may have altered atrial function due to surgical intervention, making a mode that relies on ventricular pacing more suitable for ensuring an adequate heartbeat.

Moreover, VVI is advantageous as it minimizes the risk of interfering with any residual intrinsic rhythm or recovery processes in the atria, providing pacing support focused solely on the ventricles and maintaining hemodynamic stability during the patient's recovery from surgery.

In summary, VVI pacing effectively addresses the needs of a postoperative patient with atrial fibrillation and a slow ventricular rate by focusing on ventricular support when natural pacing is insufficient, while preventing potential complications associated with