Extraction of pacemaker and implantable cardioverter defibrillator leads

Oesophageal perforation: an unexpected complication during extraction of a pacing lead. A case report

Background

Peri-procedural transoesophageal echocardiography (TOE) is important in monitoring and minimizing major complications during pacing lead extraction. It is a widely accepted precautionary measure, especially in extractions considered to be higher risk. Pacing lead extraction may be challenging, and it is associated with significant risk of major bleeding from vascular trauma.

Case summary

We present a case of an 87-year-old woman who had an extraction of a ventricular pacing lead that had perforated to an extra-cardiac location, most likely to the left pleural space. Peri-procedural TOE was used as a precaution. The entire pacing lead was successfully extracted with gentle traction using standard equipment (mechanical technique). Extraction was followed by development of pneumomediastinum and a left pleural effusion, initially attributed to pulmonary injury from the pacing lead but which proved to be related to oesophageal injury from the TOE.

Discussion

Transoesophageal echocardiography-related complications are uncommon but should be considered in cases of unexpected post-procedural deterioration. Clinical deterioration after a seemingly uneventful procedure should prompt a thorough case review. A systematic approach should be applied to identify the offending cause and enable corrective measures to be undertaken. This case report is an important reminder to all operators utilizing TOE for peri-procedural purposes that this precautionary measure itself also independently exposes the patient to additional risk.

Percutaneous Lead Extraction in Infection of Cardiac Implantable Electronic Devices: a Systematic Review

INTRODUCTION

In the last two decades, the increased number of implants of cardiac implantable electronic devices has been accompanied by an increase in complications, especially infection. Current recommendations for the appropriate treatment of cardiac implantable electronic devices-related infections consist of prolonged antibiotic therapy associated with complete device extraction. The purpose of this study was to analyze the importance of percutaneous extraction in the treatment of these devices infections.

METHODS

A systematic review search was performed in the PubMed, BVS, Cochrane CENTRAL, CAPES, SciELO and ScienceDirect databases. A total of 1,717 studies were identified and subsequently selected according to the eligibility criteria defined by relevance tests by two authors working independently.

RESULTS

Sixteen studies, describing a total of 3,354 patients, were selected. Percutaneous extraction was performed in 3,081 patients. The average success rate for the complete percutaneous removal of infected devices was 92.4%. Regarding the procedure, the incidence of major complications was 2.9%, and the incidence of minor complications was 8.4%. The average in-hospital mortality of the patients was 5.4%, and the mortality related to the procedure ranged from 0.4 to 3.6%. The mean mortality was 20% after 6 months and 14% after a one-year follow-up.

CONCLUSION

Percutaneous extraction is the main technique for the removal of infected cardiac implantable electronic devices, and it presents low rates of complications and mortality related to the procedure.

Successful extraction of right ventricular lead remnants using the FlexCath® steerable sheath

In patients undergoing laser lead extraction, incomplete or failed lead removal occur in over 3 % of leads. Because the current available tools have limitations in reaching the right ventricle (RV), the procedure becomes challenging when the lead breaks and its fragments remain lodged in the RV. We describe two cases in which the FlexCath® steerable sheath, normally used in cryoballoon catheter ablation for atrial fibrillation, was useful in directing a bioptome to right ventricular lead fragments and thus allowing for complete lead extraction.

Percutaneous pacemaker and implantable cardioverter-defibrillator lead extraction in 100 patients with intracardiac vegetations defined by transesophageal echocardiogram

OBJECTIVES

We describe the feasibility, safety, and clinical outcomes of percutaneous lead extraction in patients at a tertiary care center who had intracardiac vegetations identified by transesophageal echocardiogram.

BACKGROUND

Infection in the presence of intracardiac devices is a problem of considerable morbidity and mortality. Patients with intracardiac vegetations are at high risk for complications related to extraction and protracted clinical courses. Historically, lead extraction in this cohort has been managed by surgical thoracotomy.

METHODS

We analyzed percutaneous lead extractions performed from January 1991 to September 2007 in infected patients with echocardiographic evidence of intracardiac vegetations, followed by a descriptive and statistical analysis.

RESULTS

A total of 984 patients underwent extraction of 1,838 leads; local or systemic infection occurred in 480 patients. One hundred patients had intracardiac vegetations identified by transesophageal echocardiogram, and all underwent percutaneous lead extraction (215 leads). Mean age was 67 years. Median extraction time was 3 min per lead; median implant duration was 34 months. During the index hospitalization, a new device was implanted in 54 patients at a median of 7 days after extraction. Post-operative 30-day mortality was 10%; no deaths were related directly to the extraction procedure.

CONCLUSIONS

Patients with intracardiac vegetations identified on transesophageal echocardiogram can safely undergo complete device extraction using standard percutaneous lead extraction techniques. Permanent devices can safely be reimplanted provided blood cultures remain sterile. The presence of intracardiac vegetations identifies a subset of patients at increased risk for complications and early mortality from systemic infection despite device extraction and appropriate antimicrobial therapy.

Do abandoned leads pose risk to implantable cardioverter-defibrillator patients?

BACKGROUND

With the increased number of implantable cardioverter-defibrillator (ICD) recipients and the frequent need for device upgrading, lead malfunction is a concern, but the optimal approach to managing nonfunctioning leads is unknown.

OBJECTIVE

The purpose of this study was to determine the rate and characteristics of complications related to abandoned ICD leads.

METHODS

Patients with abandoned leads were identified by retrospective review of the Mayo Clinic ICD database from August 1993 to May 2002. We reviewed the medical records to assess long-term follow-up for venous thromboembolic complications, device sensing malfunction, appropriateness of delivered shocks, defibrillation threshold (DFT) values before and after lead abandonment, and subsequent surgical procedures related to devices or leads.

RESULTS

We identified 78 ICD patients (81% males; mean age 63 +/- 14 years) with 101 abandoned leads (69 in the right ventricle, 31 in the right atrium or superior vena cava, 1 in the coronary sinus). During a mean follow-up of 3.1 +/- 2.0 years, neither sensing malfunction nor venous thromboembolic complications were detected. DFT values were high in 13 patients (17%), but there was no significant increase in mean DFT values before and after lead abandonment in 43 patients for whom both values were available (16.2 +/- 9.2 J before abandonment vs 14.1 +/- 5.5 J after; P = .24). Fourteen patients (18%) required further ICD-related surgery; none of these operations were attributed to abandoned leads. Five-year rates of appropriate and inappropriate shocks were 25.9% and 20.5%, respectively.

CONCLUSION

Abandoning a nonfunctioning lead appears to be safe and does not pose a clinically significant additional risk of future complications.

Cardiac pacemaker lead extraction using conventional techniques:a single centre experience

BACKGROUND

New methods of lead extraction using laser sheath devices are under evaluation but these techniques are not available in the majority of centres and have cost implications. Furthermore, in the absence of comparative randomised trials, registry experience with new devices must be judged against contemporary data using conventional methods. We report a single centre series of pacemaker lead extraction using conventional methods.

METHODS

STUDY POPULATION

Attempted extraction of 165 leads during 95 procedures in 80 patients. Leads had been in place (dwell time) for a mean of 76 months (range 0.2-248.4 months). Indications for lead extraction: infection (41.1%), skin erosion (9.5%), advisory leads (12.6%), faulty leads (12.6%), other (24.2%). Extraction techniques: traction and/or locking stylets and dilator sheaths (89.7%), Byrd workstation (6.1%) and open thoracotomy (4.8%).

RESULTS

Complete removal was achieved for 143 leads (86.7%), partial removal in 12 leads (7.3%) and 10 (6.1%) could not be removed. A shorter lead dwell time was associated with extraction success in both univariate (p=0.0004) and multivariate analyses (p<0.0001). There was a trend for a higher rate of success in atrial rather than ventricular leads (93.2% v 80.9%, p=0.052). Active fixation, patient gender, age and indication for lead extraction had no bearing on outcome.

COMPLICATIONS

There were no deaths. Major complications occurred in 3 patients (3.2%): pericardial tamponade (1), pulmonary embolus (1) and stroke (1). Significant bleeding (requiring blood transfusion) occurred in 11 procedures (12%).

CONCLUSIONS

Cardiac lead extraction using conventional methods has a high success rate of 86.7%. Success was significantly related to a shorter lead dwell time. Further prospective randomised trials are needed to compare traditional techniques with laser extraction both in terms of clinical outcome and cost-effectiveness.

The use of radiofrequency catheter ablation to extract a chronic permanent pacemaker lead after failed laser extraction

Even with the latest advances in pacemaker lead extraction techniques, successful lead extraction via percutaneous techniques still cannot be achieved in up to 2% of procedures at qualified centers reiterating the need for further development in this area. We present an example of a novel technique using radiofrequency (RF) energy delivered with a steerable ablation catheter to facilitate lead removal using an 8-french guiding sheath (SRO, Daig corporation) and a bidirectional steerable 4 mm tip ablation catheter (EPT). With a short series of RF ablations, the pacemaker lead tip was successfully freed without complications.

Laser-assist during extraction of chronically implanted pacemaker and defibrillator leads

BACKGROUND

Extraction of chronically implanted pacing and defibrillator leads has historically been difficult, occasionally requiring open surgical procedures. The purpose of this study was to evaluate the efficacy, safety, and potential need for percutaneous laser-assisted sheath techniques for extraction of chronically implanted leads.

METHODS

From January 1999 to August 2001, 128 consecutive patients underwent extraction of 229 leads (138 pacing, 91 defibrillator) in the operating room 61 +/- 44 (mean +/- standard deviation) months after implantation. Common indications included erosion or pocket infection (41%), lead dysfunction (30%), and sepsis (13%).

RESULTS

Laser techniques were used for 56% +/- 4% (104 of 186) of long-term (implanted for more than 1 year) leads, compared with only 16% +/- 6% (7 of 43) of short-term (implanted for less than 1 year) leads (p < 0.001). For infected leads, laser was used in 53% +/- 5% (49 of 92) with erosion or pocket infections, compared with only 3% +/- 4% (1 of 29) with sepsis (p < 0.001). Extraction was complete in 88%, near complete (retained tip) in 10%, and incomplete in 2%. Two patients required a later percutaneous femoral venous approach to remove mobile retained segments, but no patients required cardiac surgery for extraction. Complications included sternotomy for subclavian vein injury (1), chest tube for caval perforation (1), innominate vein thrombosis (1), and partial clavicle removal for subclavian vein repair (2). There were no procedure-related deaths.

CONCLUSIONS

Laser-assisted lead extraction is safe, but it is best performed in the operating room; it should be available for long-term leads, except when they are grossly infected, producing sepsis. Laser techniques have essentially eliminated the need for open surgical removal of retained leads.

Emergencies related to implantable cardioverter-defibrillators

Implantable cardioverter-defibrillators (ICDs) have become the dominant therapeutic modality for patients with life-threatening ventricular arrhythmias. ICDs are implanted using techniques similar to standard pacemaker implantation. They not only provide high-energy shocks for ventricular fibrillation and rapid ventricular tachycardia, but also provide antitachycardia pacing for monomorphic ventricular tachycardia and antibradycardia pacing. Devices incorporating an atrial lead allow dual-chamber pacing and better discrimination between ventricular and supraventricular tachyarrhythmias. Intensivists are increasingly likely to encounter patients with ICDs. Electrosurgery can be safely performed in ICD patients as long as the device is deactivated before the procedure and reactivated and reassessed immediately afterward. Prompt and skilled intervention can prove to be life-saving in patients presenting with ICD-related emergencies, including lack of response to ventricular tachyarrhythmias, pacing failure, and multiple shocks. Recognition and treatment of tachyarrhythmia can be temporarily disabled by placing a magnet on top of an ICD. The presence of an ICD should not deter standard resuscitation techniques. Multiple ICD discharges in a short period of time constitute a serious situation. Causes include ventricular electrical storm, inefficient defibrillation, nonsustained ventricular tachycardia, and inappropriate shocks caused by supraventricular tachyarrhythmias or oversensing of signals. ICD system infection requires hardware removal and intravenous antibiotic therapy. Deactivation of an ICD with the consent of the patient or relatives is reasonable and ethical in terminally ill patients.

Feasibility, safety, and determinants of extraction time of percutaneous extraction of endocardial implantable cardioverter defibrillator leads by intravascular countertraction method

Previous studies of the removal of implantable cardioverter defibrillator (ICD) leads have been restricted to case reports or small series. In this report, we describe our experience in ICD lead extraction by intravascular countertraction method using Cook's extraction kit. A total of 47 high-voltage (HV) leads, 3 rate sensing (S) leads, and 2 subcutaneous arrays were removed from 42 patients (33 men, 9 women; mean age 59 years [range 14 to 81]). One HV superior vena cava (SVC) lead and 11 HV right ventricular (RV) leads were explanted by manual traction only and defined in the "lead removal" category. One S lead was removed using a femoral venous approach. The remaining 37 leads were explanted by SVC approach using extraction sheaths and defined in the "lead extraction" category. Twenty leads were extracted for "infectious" (group A) and 17 leads for "noninfectious" (group B) etiologies for which extraction times of 27.0+/-18.0 and 27.0+/-15.0 minutes (mean+/-SD), respectively, were not different. Although extraction time, 34.0+/-11.0 minutes, for leads implanted for >48 months was longer than 23.0+/-16.0, 28.0+/-18.0, and 24.0+/-14.0 minutes, for leads with implant durations of 12, 24, and 48 months, respectively, such differences were not statistically significant. The extraction time, however, was directly related to the degree of fibrosis around the lead, 39.0+/-15.0 minutes for leads with severe fibrosis compared with 13.0+/-6.0 minutes for the leads with mild fibrosis (p<0.001). Patient's age, sex, or history of coronary artery bypass graft surgery did not significantly affect extraction time. All except the initial 2 lead extractions were performed in the electrophysiology laboratory. No mortality or serious complications associated with the procedure using these methods were observed.