What non-invasive pacing method is specifically suited for immediate treatment of certain arrhythmias?

Transcutaneous external cardiac pacing is the non-invasive pacing method specifically suited for the immediate treatment of certain arrhythmias, particularly symptomatic bradycardia or other forms of heart block when rapid intervention is necessary. This technique involves placing pads on the skin to deliver electrical impulses that stimulate the heart to beat at an appropriate rate, typically used in emergency situations.

In cases where immediate action is required, transcutaneous pacing is beneficial due to its rapid setup and ability to provide temporary pacing without the need for more invasive procedures. This makes it vital in a pediatric advanced life support scenario, where timely treatment can significantly impact patient outcomes.

Other methods like intravenous pacing or endotracheal pacing are either not standard practices for pacing or are not specifically indicated for immediate use in acute settings. Cardiac resynchronization therapy is a long-term treatment option for heart failure, focusing on improving the synchronization of the cardiac cycles, but it is not applicable as an immediate pacing solution in emergency situations.