304Cryoablation versus Radiofrequency Ablation of the Atrioventricular Node in Patients with His-bundle Pacing

EP Europace ◽  
2020 ◽  
Vol 22 (Supplement_1) ◽  
Author(s):  
A Zweerink ◽  
E Bakelants ◽  
C Stettler ◽  
H Burri
Keyword(s):  
Radiofrequency Ablation ◽  
Atrioventricular Node ◽  
P Value ◽  
Success Rates ◽  
His Bundle ◽  
His Bundle Pacing ◽  
Total Procedure Time ◽  
Redo Procedure ◽  
Procedural Success ◽  
Transient Elevation

Abstract Background Atrioventricular node (AVN) ablation in the setting of His bundle pacing (HBP) may be challenging due to risk of compromising the function of the His lead. Cryoablation (CRYO) may offer theoretical advantages over conventional radiofrequency ablation (RFA), due to absence of shunting of current to the His lead, more discrete lesions, and potential reversibility in case of transient elevation of capture thresholds. However, CRYO has never been tested for AVN ablation in this setting. Purpose To compare procedural characteristics and outcome of CRYO compared to RFA for AVN ablation in patients with HBP. Methods Thirty-five patients (age 76 ± 8 yrs, 23% male) with HBP underwent AVN ablation for an "ablate and pace" indication. CRYO was performed in the first 22 pts and RFA in the following 13 pts. Procedure and fluoroscopy times, change in His threshold and success rates were compared between groups. Results The acute procedural success rate was 100% for both strategies without any major complications. There were no significant differences in procedure characteristics and outcome between CRYO and RFA, except for significantly shorter application times with RFA and a trend to more frequent reconduction and requirement for a redo procedure with CRYO (see table). All recurrences occurred within one month after ablation. Conclusion CRYO does not seem to offer any advantage over RFA for AVN ablation in patients with HBP, and does not avoid rise of His capture thresholds. Moreover, the recurrence rate may be higher with CRYO leading to more redo procedures. Table Parameter CRYO (22 pts) RFA (13 pts) P-value Total procedure time (min) 50 [38 - 63] 40 [33 - 53] 0.257 Fluoroscopy time (min) 5.0 [2.2 - 5.4] 3.5 [1.9 - 9.0] 0.578 Expo Rx (mcGy.cm2) 237 [110 - 525] 139 [65 - 721] 0.468 Number of applications (n) 6 [3 - 11] 4 [1 - 15] 0.371 Total application time (min) 17 [9 - 29] 3 [1 - 9] 0.001 His threshold pre-ablation (V) 1.63 [0.75 - 3.44] 0.75 [0.53 - 1.63] 0.180 His threshold post-ablation (V) 1.88 [0.75 - 3.81]* 1.25 [0.63 - 3.50] 0.389 His threshold change (V) 0.00 [0.00 - 0.31]* 0.00 [0.00 - 0.75] 0.933 His threshold rise ≥1 volt (n) 4 (18%)* 3 (23%) 0.726 Acute procedural success (n) 22 (100%) 13 (100%) 1.000 AV reconduction during follow-up (n) 5 (23%) 1 (8%) 0.254 AV reconduction needing redo procedure (n) 3 (14%) 0 0.146 Interquartile range is shown in square brackets. *one loss of capture.

Cryoablation vs. radiofrequency ablation of the atrioventricular node in patients with His-bundle pacing

EP Europace ◽  
2020 ◽  
Author(s):  
Alwin Zweerink ◽  
Elise Bakelants ◽  
Carine Stettler ◽  
Haran Burri
Keyword(s):  
Radiofrequency Ablation ◽  
Atrioventricular Node ◽  
Complete Loss ◽  
Success Rates ◽  
His Bundle ◽  
His Bundle Pacing ◽  
Acute Success ◽  
Redo Procedure ◽  
Biplane Fluoroscopy

Abstract Aims Radiofrequency ablation (RFA) of the atrioventricular node (AVN) with His-bundle pacing (HBP) can cause rise in capture thresholds. Cryoablation (CRYO) may offer reversibility in case of threshold rise but has never been tested for AVN ablation in this setting. Our aim was to compare procedural characteristics and outcome of CRYO compared with RFA for AVN ablation in patients with HBP. Methods and results Forty-four patients with HBP underwent AVN ablation for an ‘ablate and pace’ indication. Cryoablation was performed in the first 22 patients and RFA in the following 22 patients. Procedural characteristics, success rates, and change in His capture thresholds were compared between groups. Distance from the ablation site to the His lead was measured using biplane fluoroscopy. Acute success was 100% with both strategies. Median procedural duration was significantly longer for CRYO {50 [interquartile range (IQR) 38–63] min} compared with RFA [36 (IQR, 30–41) min; P = 0.027]. An acute threshold rise of ≥1 V was observed in four CRYO (one complete loss of capture) and three RFA patients (P = 0.38), with all of the applications being within 6 mm of the His lead tip. During follow-up, nine patients had AVN re-conduction (six CRYO vs. three RFA; P = 0.58), but only four patients required a redo procedure (all CRYO; P = 0.09). Conclusion Cryoablation does not offer any advantage over RFA for AVN ablation in patients with HBP and tended to require more redo procedures. If possible, a distance of ≥6 mm should be maintained from the His lead tip to avoid a rise in capture thresholds.

scholarly journals 204 Permanent his bundle pacing using stylet-driven lead in patients with right atriomegaly: a single-centre experience

2021 ◽  
Vol 23 (Supplement_G) ◽  
Author(s):  
Leonardo Marinaccio ◽  
Francesco Vetta ◽  
Eros Rocchetto ◽  
Paola Napoli ◽  
Domenico Marchese
Keyword(s):  
The Novel ◽  
Success Rates ◽  
Pacing Threshold ◽  
Lead System ◽  
His Bundle ◽  
His Bundle Pacing ◽  
First Choice ◽  
Single Centre Experience ◽  
Qrs Duration ◽  
Procedural Success

Abstract Aims His bundle pacing (HBP) is becoming an increasing widespread approach for physiological pacing. However, successful HBP procedure could be hampered by limited implantation tools especially in challenging anatomies. We aimed to report our experience with HBP technique using a novel stylet-driven lead system in patients with right atriomegaly. Methods and results Consecutive patients with right atrium (RA) volume >25 ml/m2 in men and >21 ml/m2 in women who underwent permanent HBP for standard indications were enrolled from March 2020 to March 2021. The tool of first choice for HBP attempt was a stylet-driven lead (Solia S 60, Biotronik) delivered via a dedicated introducer sheath (Selectra 3D, Biotronik). The acute, 1-month and 6-month procedural success rates were assessed. We enrolled 24 patients [median age: 75 (70–79) years, 85% men] with an average RA volume of 50.7 ± 7.8 ml/m2. At implant, conduction system pacing using stylet-driven lead was achieved in 21 patients (87%): 12 (50%) selective HBP, 6 (25%) non-selective HBP, and 3 (12.5%) left bundle branch area pacing. In the three failures, HBP was further attempted with a lumen-less lead with fixed helix (SelectSecure 3830, Medtronic) with final procedural success in two cases. In the successful cases, there was a significant reduction of QRS duration between paced and spontaneous beats [152.5 (130–167.5) ms vs. 130 (122.5–137.5) ms, P = 0.003]. No lead dislodgment nor significant pacing threshold increase was observed at 1-month (1.30 ± 0.76 [email protected] vs. 1.32 ± 0.80 [email protected] ms, P > 0.9) and 6-month follow-up (1.30 ± 0.76 [email protected] vs. 1.38 ± 0.97 [email protected] ms, P = 0.66). Conclusions In patients with right atriomegaly, the novel stylet-driven lead system showed high implant success rates with stable pacing thresholds.

Short and Long Term Outcome In Patients with Calcified Lesions Requiring Rotational Artherectomy

2021 ◽  
Vol 35 (2) ◽  
pp. 140-146
Author(s):  
Lima Asrin Sayami ◽  
Al Fazir Omar ◽  
Sheikh Ziarat Islam ◽  
Subasni Govindan ◽  
Zulaikha Zainal ◽  
...  
Keyword(s):  
P Value ◽  
Success Rates ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Operator Experience ◽  
Kaplan Meier ◽  
Significant Difference ◽  
Short And Long Term ◽  
Procedural Success

Objective: Despite the evolution of interventional techniques and operator experience, percutaneous revascularization of complex coronary lesions especially calcified lesions remains challenging because of lower procedural success and higher restenosis rates. Limited data are available on the effect of rotational atherectomy (RA) plus stenting in the treatment of complex calcified lesions of coronary artery disease. This study was aimed to investigate the characteristics, short and long term outcomes in patients undergoing RA. Material and Methods: A database search was performed from the year 2008 to 2013 in National Heart institute, Malaysia. A total of 16009 patients who underwent PCIs were enrolled in 2 groups, RA group (258 patients) and non RA group (15751 patients). The Chi square test and Kaplan - Meier analysis were used. Results: Male patients (73.6%) and elderly population (63.2%) were predominant in this study.The RA group had more co-morbidities such as diabetic on insulin (34%) and chronic kidney disease (57%). The lesions in RA group were more complex with higher Type C lesion (68.8%) and longer lesion (20.6%) compared to non RA group. Despite higher patient risk profile, the success rate of revascularization remains high in RA group (99.3%) as in non RA group (97%) (p value 0.89%). More importantly there were no significant difference in in-hospital mortality, myocardial infarction and stent thrombosis in both group (p value 0.1). In 1 year Kaplan - Meier survival graph, there were better survival noted in non RA group (97.7%) compare to RA (89.6%) (p value <0.005), Conclusion: The use of RA allows debulking of a calcified lesion and possibly explains the higher acute procedural success rates. However, the lower 1-yearsurvival in the RA group highlights the higher associated baseline comorbitidity in this group. Therefore, besides coronary intervention, this RA group requires aggressive medical therapy through a multi-disciplinary approach. Bangladesh Heart Journal 2020; 35(2) : 140-146

scholarly journals Location of accessory pathways and its radiofrequency ablation in Wolf-Parkinson-White syndrome

2006 ◽  
Vol 134 (9-10) ◽  
pp. 386-392 ◽  
Author(s):  
Dejan Vukajlovic ◽  
Lazar Angelkov ◽  
Aleksandar Neskovic
Keyword(s):  
Radiofrequency Ablation ◽  
Interface Temperature ◽  
Success Rates ◽  
Recurrence Rates ◽  
Accessory Pathways ◽  
First Line Therapy ◽  
Total Procedure Time ◽  
Significant Difference ◽  
Primary Success ◽  
The Right

Introduction: Radiofrequency ablation (RFA) of accessory pathways (AP) is the first line therapy in symptomatic patients with preexcitation syndrome, resistant to medical therapy. Objective: To evaluate the influence of AP location on RFA effectiveness. Method: The study compared RFA results of AP located on the left side, right side, and in septal area of the heart in the first 101 consecutive patients treated at Dedinje Cardiovascular Institute in Belgrade. Results: There was no significant difference between the right-, left- and septal-AP in relation to primary success rates (66.7%, 84.3%, 73.7%, respectively, p=0.285), recurrence rates (12.5%, 6.97%,14.3%, p=0.591), and final success rates (66%, 84.3%, 78.9%, p=0.37). Maximally achieved interface temperature was lowest at right-sided AP (49.8?1.9?C) as compared to the left (53.0?3.5?C) or septal AP (52.9?3.0?C) (p<0.01). Fluoroscopy time did not differ significantly (p=0.062), while total procedure time and the number of applied RF pulses was higher in the left-sided AP as compared to other two (104.6?44.9 for the left, 98.9?47.5 for the right and 80.7?39.8 minutes for the septal AP, p<0.05; 11.0?8.8 pulses for the left, 6.5?3.8 for the right and 6.4?5.0 for septal AP, p<0.01). Two major complications developed: one third-degree AV block after ablation of midseptal AP, and one pericardial effusion without tamponade, with spontaneous regression. Conclusion: The success rate of RFA of the right-, left- and septal-AP was similar. Heating of the tissue was weakest during RFA of the right-sided AP.

scholarly journals Safety and acute clinical outcomes of atrial fibrillation catheter ablation in octogenarians: a multicentre evaluation with a matched younger cohort

EP Europace ◽  
2021 ◽  
Vol 23 (Supplement_3) ◽  
Author(s):  
N Karim ◽  
N Kozhuharov ◽  
J Jarman ◽  
S Furniss ◽  
R Veasey ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Catheter Ablation ◽  
De Novo ◽  
Lv Function ◽  
P Value ◽  
Complication Rates ◽  
Success Rates ◽  
Af Ablation ◽  
Funding Sources ◽  
Procedural Success

Abstract Funding Acknowledgements Type of funding sources: None. OnBehalf Sven Knecht and the International Octogenarian AF ablation group Background Octogenarians are a fast-growing demographic with a high burden of atrial fibrillation (AF). There are limited data on procedural safety and acute outcomes of catheter ablation (CA) for AF in this group. Purpose Investigation of complications & outcomes in octogenarians undergoing CA for AF. Methods Data on all octogenarian patients who underwent AF ablation at nine European cardiology centres between 2013 and 2019 were retrospectively analysed and matched with control patients aged &lt;80 years.  The characteristics used for matching were type of AF, type of procedure (de novo or redo), & the year of procedure. Results 216 octogenarians (81.9 ± 1.9 years; 52.8% females) underwent an AF ablation procedure, and were matched with 216 patients aged &lt;80 years (62.4 ± 9.5 years, 34.7% females), p &lt;0.001 for both. The proportion of paroxysmal and persistent AF was 43.5% & 56.5% respectively in both groups, and 79.3% of the procedures were de novo. RF ablation made up 75.4% & 75.9% (p = 0.90) procedures in octogenarians and controls respectively.  17 complications occurred in 14 (7.9%) octogenarian patients and 11 in 11 (5.1%) patients in the younger matched cohort (p = 0.07). There were 4.2% & 1.9% major complications (p= 0.17) and 3.7% & 3.2% minor complications (p= 0.77) in the octogenarian & younger cohorts respectively. Complications in octogenarians consisted of groin complications (n = 6), pneumonia (n = 3), pericardial effusion (n = 2), phrenic nerve injury (n = 2), pulmonary oedema (n = 1), gastroparesis (n = 1), stroke (n = 1). Acute procedural success rates were 99.1% & 99.5% (p = 0.62) The complication rates were similar for RF; 6.0% vs 5.4% (p = 0.79) and Cryoballoon; 14.0% vs 4.1% (p = 0.09) in both octogenarians and younger cohort respectively. Conclusion In spite of significantly higher overall risk profile of octogenarians undergoing AF ablation, there is no difference in acute procedural success and complication rates as compared to younger patients Catheter ablation of AF in octogenerians Octogenarians n = 216 Matched Controls (aged &lt; 80yrs) n = 216 P value Age (yrs), mean (SD)s 81.9 (1.9) 62.4(9.5) &lt; 0.0001 Females, (%) 52.8 34.7 0.0002 CHA2DS2-VASc, mean (SD) 3.6 (1.2) 1.4 (1.3) &lt; 0.0001 Mean LA size, mm 42.8 ± 8.3mm 45.8 ± 16.2 0.062 Impaired LV function, (%) 23.7 17.9 0.206 IHD, (%) 20.7 5.9 &lt; 0.0001 Procedural time (mins), mean (sd) 150.6 (69.7) 148.9 (64.4) 0.914 All complications, n (%) 17 (7.9) 11 (5.1) 0.073

His Bundle Pacing can be Safely Performed Post–Atrioventricular Node Ablation

2018 ◽  
Vol 27 ◽  
pp. S167
Author(s):  
B. Abu Baker ◽  
C. Chow ◽  
P. Barlis ◽  
C. Eastwood ◽  
U. Mohamed
Keyword(s):  
Atrioventricular Node ◽  
His Bundle ◽  
His Bundle Pacing
Sign in / Sign up

Export Citation Format

Share Document