The initial U.S. experience with the Tempo active fixation temporary pacing lead in structural heart interventions

Bedside Clinician's Guide to Pulmonary Artery Catheters

BACKGROUND

Pulmonary artery catheters provide important information about cardiac function, mixed venous oxygenation, and right-sided pressures and potentially provide temporary pacing ability.

OBJECTIVE

To provide bedside clinicians with guidance for techniques to insert right heart monitors and devices, describe risk factors for difficult insertion and contraindications to placement, and provide updates on new technologies that may be encountered in the intensive care unit.

METHODS

An extensive literature review was performed. Experienced clinicians were asked to identify topics not addressed in the literature.

RESULTS

Advanced imaging techniques such as transesophageal echocardiography or fluoroscopy can supplement traditional pressure waveform-guided insertion when needed, and several other techniques can be used to facilitate passage into the pulmonary artery. Caution is warranted when attempting insertion in patients with right-sided masses or preexisting conduction abnormalities. New technologies include a pacing catheter that anchors to the right ventricle and a remote monitoring device that is implanted in the pulmonary artery.

DISCUSSION

Bedside clinicians should be aware of risk factors such as atrial fibrillation with dilated atria, decreased ventricular function, pulmonary hypertension, and right-sided structural abnormalities that can make pulmonary artery catheter insertion challenging. Clinicians should be familiar with advanced techniques and imaging options to facilitate placement.

CONCLUSION

The overall risk of serious complications with right heart catheter placement and manipulation is low and often outweighed by its benefits, specifically pressure monitoring and pacing.

Reducing cardiac tamponade caused by temporary pacemaker perforation in transcatheter aortic valve replacement

BACKGROUND

Cardiac tamponade caused by temporary right ventricular (RV) pacemaker perforation is a rare but serious complication in transcatheter aortic valve replacement (TAVR).

AIMS

To study the incidence of temporary pacemaker related cardiac tamponade in TAVR, and the relation to the type of pacemaker lead used in periprocedural temporary transvenous pacing.

METHODS

A single center registry of transfemoral TAVRs in 2014-2020. Main inclusion criterion was peri-operative use of a temporary RV pacing lead. Main exclusion criteria were a preoperatively implanted permanent pacemaker or the exclusive use of left ventricular guidewire pacing. Incident cardiac tamponade was classified as pacemaker lead related, or other. Patients were grouped according to type of temporary RV pacing wire.

RESULTS

810 patients were included (age 80.5 ± 7.3 [mean ± standard deviation], female 319, 39.4%). Of these, 566 (69.9%) received a standard RV temporary pacing wire (RV-TPW), and 244 (30.1%) received temporary RV pacing through a permanent, passive pacemaker lead (RV-TPPL). In total, 18 (2.2%) events of cardiac tamponade occurred, 12 (67%) were pacemaker lead related. All pacemaker lead-related cardiac tamponades occurred in the group who received a standard RV-TPW and none in the group who received RV-TPPL (n = 12 [2.1%] vs. n = 0 [0%], p = 0.022). No difference in cardiac tamponade due to other causes was seen between the groups (p = 0.82).

CONCLUSIONS

The use of soft-tip RV-TPPL was associated with a lower risk of pacemaker related cardiac tamponade in TAVR. When perioperative pacing is indicated, temporary RV-TPPL may contribute to a significant reduction of cardiac tamponade in TAVR.

Innovative use of biotrace tempo pacemaker lead following cardiac surgery

The Tempo® Temporary Pacing Lead is a temporary, transvenous, active fixation pacemaker lead used exclusively in structural heart and electrophysiology procedures since regulatory approval in 2016. We utilized the Tempo lead for four patients undergoing redo-robotic cardiac surgery in which surgical epicardial leads could not be placed. No failure-to-pace events were encountered and patients were able to participate in various levels of physical activity without limitation.

The Wattson temporary pacing guidewire for transcatheter heart valve implantation

Transcatheter aortic valve implantation and implantation of other transcatheter heart valves, generally requires insertion of a temporary venous pacemaker. Implantation of a temporary venous pacemaker adds complexity, time and risk to the procedure. Guidewire modification to allow pacing is increasingly popular, however it requires technical expertise and provides unipolar pacing resulting in high thresholds and potential capture loss. The Wattson temporary pacing guidewire is a novel device which offers guidewire support for valve delivery and concomitant bipolar pacing. It may offer a safe and effective solution to guidewire pacing for transcatheter aortic valve implantation and other transcatheter heart valve implantations. Herein, we review the literature surrounding left ventricular guidewire pacing along with the features and clinical data of the Wattson wire.

[Organization and management of acute complete atrioventricular block: Results from a Multicenter National Survey]

BACKGROUND

Complete atrioventricular block (AVB3) may be an urgent potentially lifethreatening situation. Our objective was to describe the routine management of AVB 3, with emphasis on the organizational aspects.

METHODS

From September 2019 to November 2019, a prospective national survey including 28 questions was electronically sent to 100 physicians (Google Form).

RESULTS

The answers were collected from 93 physicians (response rate 93%). Permanent pacemaker implantation during weekends and nights (after 8PM) is possible for 49% of the operators (<5 times a year), for 15% (>5 times a year), impossible for 36% of the operators. For AVB3 nonresponsive to isoproterenol occurring during the night, a temporary pacing lead (TPL) is implanted by: the on-site medical staff on-duty (27%), the on-call interventional cardiologist (21%), the on-call electrophysiologist (19%), a permanent pacemaker is implanted by the electrophysiologist (12%), the strategy is not standardized (15%). An externalized active fixation lead (AFL) for AVB3 has already been implanted by 50% of the operators. 80 (86%) have already observed a dislocation of the TPL, a cardiac perforation already occurred in 57 (61%), a groin hematoma in 35 (38%), and this technique was proscribed for 4% of the operators.

CONCLUSION

Our survey shows important disparities in terms of management of AVB3 among the different centers. An externalized AFL with a reusable generator was used by half of the centers.