What device is appropriate for non-invasive pacing?

A transcutaneous pacemaker is the appropriate device for non-invasive pacing, which is a crucial intervention in cases of acute bradyarrhythmias or when rapid heart rate correction is needed without the need for invasive procedures. This device delivers electrical impulses through the skin to stimulate the heart to beat, making it a valuable tool in emergency situations where immediate pacing is required.

In contrast, a transvenous pacemaker is an invasive device that is inserted through a vein directly into the heart, making it inappropriate for non-invasive scenarios. A cardioversion machine is primarily used to restore normal rhythm in cases of certain types of tachyarrhythmias through synchronized electrical shocks, not pacing. Similarly, a defibrillator is used to provide a high-energy shock to the heart in the event of life-threatening arrhythmias like ventricular fibrillation or pulseless ventricular tachycardia, rather than for pacing purposes.