Echocardiographic findings in patients with cardiac implantable electronic devices-analysis of factors predisposing to lead-associated changes.

Lead dwell time is the main factor predisposing to the occurrence of most lead-associated phenomena visualized by TEE in patients with cardiac implantable electronic devices (CIED). Excessive looping of the lead is an important cause of fibrous binding sites and LDTD. AMEL are frequently detected in CIED patients, and their various forms concurrent with vegetations could represent an evolutionary stage of lead-associated masses.