The Placement of Atrial Pacing Leads in Patients after Cardiac Surgery Dept. of Cardiology, First Affiliated Hospital, Nanjing Medical University Jiangang Zou, M.D.; Ph.D.
Introduction The incidence of AVB and SND following open-heart surgery for congenital heart disease: 1%~4% The incidence of bradyarrhythmias after cardiac transplantation varies from 8% to 23% The experience of the permanent pacing after open-heart surgery is rare The placement of atrial pacing leads
Circulation 2008,117:e350-e408
Recommendations for permanent pacing in children, adolescents, and patients with congenital heart disease
Recommendations for permanent pacing in children, adolescents, and patients with congenital heart disease
Recommendation for pacing after cardiac transplantation
The implantation of pacing leads Transvenous: Cephelic/subclavian puncture/active lead Epicardial: small body size Fontan-type procedures tricuspid valve replacement The placement of atrial pacing leads
Europace 2007,9:426-31
Lead failures: EPI: 18% OF ATRIAL LEADS, 24% OF VENTRICULAR LEADS ENDO: 5% OF VENTRICULAR LEADS Single-lead, VVIR ENDO pacing had higher efficiency and safety than EPI.
Ann Thorac Surg. 2008;85(5):1704-11
239 bipolar steroid-eluting epicardial leads in 114 cases 12-year follow-up Average atrial and ventricular threshold:1.2V/0.5ms Thresholds of LA and RA: 0.82V/0.5ms and 0.74V/0.5ms Thresholds of LV and RV: 0.96V/0.5ms and 0.94V/0.5ms P sensing of LA and RA: 3.4mV and 2.9mV V sensing of LV and RV: 11.2mV and 7.7mV Lead failure: 19(8%) Lead survival at 2 and 5 year : 99% and 94% for atrial leads 96% and 85% for ventricular leads
Bipolar steroid-eluting epicardial leads demonstrate excellent sensing characteristics and persistent low pacing threshold
Eur J Cardiothorac Surg 2000;17:455-461
Transvenous pacing in the pediatric population is associated with a lower threshold and lower rate of lead-related complications If EPI lead necessary, steroid-eluting leads recommended
J Thorac Cardiovasc Surg 1999;117:523-528
Lead failure: 4 (epi) vs 4 (endo) Lead survival at 2 year: 91% (epi) vs 87% (endo)
Steroid-eluting epi leads have the same longevity as the conventional endo lead Pacing and sensing are similar Steroid-eluting epi leads are good alternatives for endo leads for small children
PACE 2009:32:779-785
Compared to epi lead, transvenous atrial pacing lead may be placed in Fontan patients with lower procedure morbidity and expectation of lead performance and longevity.
3 DDD cases after surgery atrial lead characteristics: sensing threshold impedance lead pt.1 at impant(17y) 4.5mv 0.6V/0.4ms 650 passive follow-up(4y) 2.5mv no capture 680 pt.2 at impant(34y) 2.2mv 0.5V/0.4ms 720 active follow-up(41y) 2.0mv 0.5V/0.4ms 700 pt.3 at impant(14y) 3.0mv 1.0V/0.4ms 690 active follow-up(3y) 2.5mv 1.2V/0.4ms 720
conclusions The placement of atrial lead: endocardial and epicardial Endocardial: screw-in, older children Epicardial: steroid-eluting lead recommended small body size Fontan-type procedures tricuspid valve replacement Follow-up
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