New generations pacemakers and ICDs: an update
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1 Advances in Cardiac Arrhythmias and Great Innovations in Cardiology XXVII Giornate Cardiologiche Torinesi New generations pacemakers and ICDs: an update Prof. Fiorenzo Gaita, MD Division of Cardiology Department of Medical Sciences University of Turin
2 Pacemaker s Evolution
3 Pacemaker s Evolution Demand Circuit A. Leatham G. Davies 1st wearable Devices (Medtronic) Hg/Zn batteries Improved lead desing Tines and active screw Nuclear generator Titanium casing Non-invasive progamming Dual chamber PMs Steroid-eluting leads Rate responsive PM ICD Biventricular pacing RV pacing minimization Telemonitoring s 1980s 2000s s 2010s 1st external PM J. Hobbs P. Zoll First Battery Operated PM E. Bakken W. Lillehei 1st transvenous implant V.Parsonnet 1st implanted device L.Ekstrom with Ni/Cad batteries E.Elmqvist - A.Senning A.Larsson Lithium-Iodine batteries Micro-processors-driven algorhithm and PMs Mode switching MRI conditional devices
4 Pacemaker Implants Worldwide New cardiac PMs implanted / year 10% of complications TRAUMATIC POCKET-RELATED LEAD-RELATED 1% 4.8% 5.5% Udo EO et al. Heart Rhythm 2012; 9:
5 N of Leads and Complications 5918 consecutive patients 10% complications Kirkfeldt RE et al. Eur Heart J 2014; 35:
6 The Lead Is the Weakest Link CHRONIC STRESS BY BEATING HEART Wazni O et al. Nat Rev Cardiol 2010; 7: Hauser RG New Engl J Med 2012; 366:10
7 System Proposed by Spickler in 1970 Spickler JW et al. J Electrocardiol 1970; 3:
8 very often the realization of an idea may take some time. Idea Technology (right tools)
9 Leadless Pacemakers NANOSTIM TM SJM MICRA TM MEDTRONIC 2 g 1.8 g
10 Nanostim TM Leadless Pacemaker Self-contained intracardiac device Length: 42 mm, maximum : 6 mm Weight: 2 g, volume: 1 cm 3 VVI / VVIR Pacemaker Temperature based rate-sensor
11 Nanostim TM Leadless Pacemaker A. Docking feature for delivery, repositioning, retrieval B. Chemical lithium battery cell 100%: 9.8 y Longevity 2.5 V, 500 Ω, 60 bpm, pacing 50%: 14.5 y C. Helix provides 1 ary fixation, tines add 2 ary fixation D. Steroid-eluting electrode tip (dexametahasone)
12 Nanostim TM Delivery Catheter Single-operator design 18 French introducer Steerable delivery catheter Tethered connection to maintain device during measurements
13 Nanostim TM Implantation Case
14 Nanostim TM Implantation Case
15 Nanostim TM Implantation Case
16 Nanostim TM Implantation Case
17 Nanostim TM Implantation Case
18 Prospective, multicenter, non-randomized, FDA IDE study Total Cohort: All patients enrolled by June 2015 (n=526) Primary Endpoints: Safety: freedom from Serious Adverse Device Effects Efficacy: Acceptable pacing capture threshold (< msec) and sensing amplitude (R wave 5.0 mv) N Engl J Med 2015; 373:
19 Multicenter Study, 526 patients (mean age 75 yrs) Main indication to implantation: - Permanent AF with AV block 294 (56%) - Sinus bradycardia with pauses/syncope 186 (35%) - SR with 2 nd /3 rd degree AV block 46 (9%) Device successfully implanted in 504/526 (96%) pts Duration of implantation 47±25 / fluoroscopy 14±9 Reddy V et al. N Engl J Med 2015; 373:
20 Follow-up (6.9 months) Adverse events 40/526 (7.6%) Cardiac perforation 8 (1.5%) Vascular complications 6 (1.1%) Device dislodgement 6 (1.1%) Device retrieval due to threshold 4 (0.8%) Procedure related death 2 (0.4%) Reddy V et al. N Engl J Med 2015; 373:
21 Clinical Case R.B. 94 years old lady (59 kg, 160 cm, BMI 23) 12/2012 left-subclavear DDD-PM implant for 2:1 AV block 05/2013 transvenous lead extraction (left) for infection 05/2013 right-subclavear PM re-implant for persistent 2:1 and III grade AV block 01/2014 transvenous lead extraction (right) for infection 30/01/2014 leadless pacemaker (Nanostim TM ) implant
22 Final Leadless PM Position
23 Leadless PM Retrieval
24 Leadless PM Retrieval
25 Leadless PM Retrieval
26 Leadless PM Retrieval
27 Leadless PM Retrieval
28 Leadless PM Retrieval
29 Micra TM Transcatheter Pacing System Self-cointained intracardiac PM Length: 25.9 mm, max : 6.7 mm Weight: 1.75 g, volume: 0.8 cm 3 VVIR Pacemaker 3-axes accelerometer sensor Active fixation via 4 selfexpanding nitinol tines Interelectrode spacing 17 mm
30 Micra TM Additional Features INTRODUCER DELIVERY SYSTEM 23 F Communication with 2090 programmer Battery longevity estimates: V, 0.24 ms, 500 Ω, 100% VP From P. Neuzil ESC Barcelona
31 Micra TM Implantation Case
32 140 patients enrolled so far (Target N = 720) 100% successful implants Average implant time 37 minutes Electrical measurements in expected ranges 1 (0.7%) pericardial effusion without tamponade 11 (8%) vascular complicationsa at puncture site Eur Heart J 2015; 36:2510-9
33 Other Manufacturers
34 Leadless PM - Conclusions Leadless right ventricular pacing has been proved feasible, with advantages for selected patients in terms of lead failure and infective complications Most common procedure related adverse events include risk of cardiac perforation and vascular access complications
35 Leadless PM Limitations and Open Questions Leadless pacing is currently limited to single right ventricular pacing Long-term reliability data are lacking How patients should be managed at the time of elective battery replacement?
36 ICD s Evolution
37 ICD Lead Performance 20-30% ICD transvenous lead fail by 10 yrs Circulation 2007; 115: Circulation 2008; 117:
38 ICD s Evolution 2008 primo impianto S-ICD in uomo SUBCUTANEOUS ICD 145 g 69 cc
39 S-ICD TM General features Biphasic shock, 50% tilt STANDARD REVERSE 80J (delivered) Up to 5 shocks per episode Charge time for 80J 10 sec Adaptive shock polarity Post-shock transcutaneous pacing (VVI@50bpm, 30 s) No ATP Battery longevity: 7.4 years* * Normal use, defined as 3 full-energy capacitor charges per year
40 S-ICD TM Implant Procedure
41 568 EFFORTLESS IDE patients J Am Coll Cardiol 2015; 65:
42 568 EFFORTLESS IDE patients 43% implanted for SCD 1ary prevention + EF <35% 1ary prevention low EF 1ary prevention other 2ary prevention 30% 27% 43% Demographic Age (years) 50.3 ± 16.9 Male (n, %) 636 (72.5) Ischemic 330 (37.8%) Genetic 58 (6.7%) Idiopathic VF 40 (4.6%) Channelopathies 90 (10.3%) NYHA Classification II-IV 327 (37.5%) Atrial Fibrillation 143 (16.4%) Previous Defibrillator 120 (13.7%) J Am Coll Cardiol 2015; 65:
43 568 EFFORTLESS IDE patients 43% implanted for SCD 1ary prevention + EF <35% 1ary prevention low EF 1ary prevention other 2ary prevention 30% 27% 43% Demographic Age (years) 50.3 ± 16.9 Male (n, %) 636 (72.5) Ischemic 330 (37.8%) Genetic 58 (6.7%) Idiopathic VF 40 (4.6%) Channelopathies 90 (10.3%) NYHA Classification II-IV 327 (37.5%) Atrial Fibrillation 143 (16.4%) Previous Defibrillator 120 (13.7%) J Am Coll Cardiol 2015; 65:
44 568 EFFORTLESS IDE patients Mortality 3.2% at 2 years First shock efficacy: 90.1% All 5 shocks set efficacy: 98.2% J Am Coll Cardiol 2015; 65:
45 Subcutaneous-ICD Concerns No antibradycardia / biventricular pacing Shock only / No antitachycardia pacing available Weight, dimensions and costs are higher than standard ICDs
46 New ESC VT and SCD Guidelines Eur Heart J Aug 29. pii: ehv316. [Epub ahead of print]
47 Potential S-ICD candidates Young patients (e.g channelopathies) without anticipated need for antibradycardia / antitachycardia or biventricular pacing are the best candidates for S-ICD
48 Thank you for your attention!
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