Ten-year study of late electrotherapy complications. Single-centre analysis of indications and safety of transvenous leads extraction.

BACKGROUND: An increase in the number of cardiac implantable electronic device (CIED) implantations is associated with a higher frequency of electrotherapy complications. AIM: The aim of the study was to determine the risk factors for late electrotherapy complications and to evaluate the effectiveness of transvenous lead extraction (TLE) and survival after TLE. METHODS: We analysed the clinical data of 225 patients with electrotherapy complications referred for TLE in a single centre in the years 2006 to 2015. Indications for TLE, risk factors for infectious complications, effectiveness of TLE, and survival after the procedure were assessed. RESULTS: In the study group, non-infectious indications for TLE predominated (78.2%). Analysis of risk for infectious complications demonstrated the important role of chronic renal failure (hazard ratio [HR] 1.842, p = 0.034) and a greater number of CIED-related procedures (HR 4.768, p < 0.001). High effectiveness of TLE and significantly higher long-term mortality of patients with infectious complications compared with the remainder (50% vs. 20%, p < 0.05) were documented. CONCLUSIONS: The study demonstrated a high rate of patients with non-infectious complications referred for TLE and very high effectiveness of the procedure. The worse long-term survival of patients with infectious complications, as well as increased risk for such complications due to the greater number of prior procedures, should prompt the consideration of early referral for TLE in the case of lead dysfunctions.

Complications of electrotherapy - the dark side of treatment with cardiac implantable electronic devices.

In the past years we have been observing the dynamic development of electrotherapy, as evidenced by the steadily rising number of implanted pacemakers (PM), as well as devices used in the treatment of dangerous arrhythmia and heart failure, such as implantable cardioverter defibrillators (ICD) and cardiac resynchronisation therapy (CRT-P/D). This is a consequence of the ageing of the populations of the majority of developed countries and also the gradually widening indications for the use of such devices. Along with the observed rise in the number of new implantations, the number of complications of electrotherapy is rising as well. In view of the increase in the incidence of complications, it is necessary to systematize the knowledge on this subject, because there is still no official classification of this type of complication and guidelines for dealing with such cases do not appear to cover the scale of the problem. In addition, late complications of electrotherapy play the most important role, in which case the removal of the entire pacing system, transvenous lead extraction (TLE), is a challenge due to the older age of leads strongly attached to the venous walls and endocardium of the heart cavity. The present paper presents a modern classification of electrotherapy complications and discusses the types of complications according to the most recent literature reports. Moreover, the diagnosis and management of particular types of complications with the assessment of indications for TLE are discussed.