What complication can arise from improper lead placement during pacing?

Improper lead placement during pacing can lead to arrhythmias or reduced efficacy of pacing because the electrical signals generated by the pacemaker may not be delivered to the heart tissue correctly. This misplacement can hinder the normal electrical conduction pathways of the heart, potentially causing the heart to respond inappropriately to pacing signals. As a result, the heart may develop arrhythmias, which are irregular heartbeats that can be either too fast, too slow, or erratic. Furthermore, if the pacemaker leads are not positioned optimally, the expected increases in heart rate or synchronized contractions may not occur, impacting the overall effectiveness of the pacing therapy. Correct lead placement is crucial for ensuring that pacing effectively supports the heart's rhythm and function, thus preventing these complications.