What does Failure to Capture indicate?

Failure to Capture refers to a scenario in which the pacemaker's electrical impulses are not effectively stimulating the heart to contract, which is often indicated by the presence of pacing spikes without corresponding QRS complexes. When there are irregular spikes with no QRS complexes, it suggests that the pacemaker has sent signals, but the heart is not responding to those signals. This lack of response is critical because it means that the heart may not be generating an adequate heartbeat, which can lead to serious complications if not addressed.

In contrast, when pacing spikes are present alongside QRS complexes, it indicates that the pacing is functioning correctly, and the heart is responding to the activity. This is fundamental for ensuring proper cardiac output and organ perfusion. Therefore, understanding Failure to Capture is vital for monitoring and managing patients who rely on pacing for their heartbeat.