What does a triggered response in pacing mean?

A triggered response in pacing refers to the scenario where a pacing pulse is delivered in response to the detection of intrinsic cardiac activity. This means that if the device senses the heart's own electrical signals, it will provide a pacing stimulus to help maintain an appropriate heart rhythm only when necessary. This approach allows for a more adaptive pacing strategy that can optimize heart function, as it ensures that pacing occurs in synchrony with the heart's natural activity rather than overriding it.

By understanding that a triggered response specifically involves the interaction between sensed intrinsic activity and the delivery of a pacing pulse, it becomes clear why this is an advantageous approach in modern pacing therapies. It leads to more efficient use of pacing, prevents unnecessary stimulation, and can reduce the risk of pacing-induced complications.