In the context of a third-degree AV block, what does transcutaneous pacing refer to?

Transcutaneous pacing refers to a method for pacing the heart using external pads that are placed on the skin. This technique is employed particularly in emergency situations, such as a third-degree AV block, where the heart's electrical signals are disrupted. In such cases, transcutaneous pacing provides a temporary solution to stimulate the heart and ensure it beats at an adequate rate, allowing for immediate stabilization of the patient.

This method is effective because the electrical impulses generated by the external pads can penetrate the skin and activate the heart muscle to contract. It is non-invasive and can be quickly applied, making it ideal for acute scenarios where rapid intervention is critical.

Other options are not applicable in this context: a surgical procedure for permanent pacing would involve implanting a pacemaker, which is a more permanent solution; medication management might include drugs to treat arrhythmias but does not directly address the immediate need for pacing; cardiac catheterization is a diagnostic and interventional procedure involving the heart's arteries and chambers, not pacing.