三维心脏显像下房颤射频消融术.ppt

1、AF ablation with 3D mapping: our technique and results,Dr Dhiraj Gupta MRCP MD DM Liverpool Heart and Chest Hospital,Northern UK AF experts Best Practice meeting Langdale Hotel, Cumbria 5 Feb 2010,Schema,Our approach to AF ablation at LHCH Our reasons for each step Our in-lab and follow-up results,O

2、ur approach in a nutshell,PVAI with Wide area circumferential ablation CT image integration using CARTO Individualised lesion set prescription Aim to ablate out of AF, ideally to SR Procedure duration limit of 5 hours,CT image registration,Critical part of the process 2 steps Single point Landmark r

3、egistration Surface Registration with Fast Anatomical Mapping Takes 5-10 minutes,CT image segmentation,Fast Anatomical Map creation,Image Surface registration,Why the individualised approach?,Heterogeneity amongst AF population Trigger removal vs Substrate Modification Aim to achieve high single pro

4、cedure success rates Incremental risk with multiple procedures Thats what the patient wants Thats what the health economists want!,Patient selection criteria,Patients not offered Catheter ablation if Very long standing Persistent AF (3 years) Very large LA (5.5 cm) Morbid Obesity (BMI 40), Sleep Apn

5、ea Significant RA dilatation (LA) Patients not offered first redo at least for 6 months Not offered Second redo if still in PsAF,Not all AF patients are the same,True PAF Short lived episodes, short history, normal sized LA Sustained PAF: 2 or more of the following AF episodes24 hours, History of AF

6、 5 years, LA size 4.5 cm, Age 65 years, Documented flutter, High AF burden (most days) Persistent AF Long standing Persistent AF (12 months),Minimum RF Lesion set,True PAF PVAI using WACA Sustained PAF + LA roof line + RA flutter line Persistent AF + LA floor line + Mitral isthmus line Long standing

7、 Persistent AF + Epicardial CS ablation+ CAF ablation,Paroxysmal PAF,Sustained PAF,Persistent AF,Long standing Persistent AF,Surgical Maze for Permanent AF,* SM Prasad et al, J Thorac Cardiovasc Surg 2003; 126: 1822-27,Still the Gold standard in terms of results 96% free of AF at 5 years*,Results wi

8、th Catheter Maze,Why CT image integration?,Forewarned is forearmed: PV anatomical variations Common Left Pulmonary Vein Additional pulmonary vein(s) Important anatomical information thickness of the LAA ridge, intervenous carina extent of the PV antra length of the mitral isthmus,Why CT image integr

9、ation?,Dramatically reduces procedural fluoro times: 10 minutes for PAF cases 10-20 minutes for PsAF cases Decreases fatigue Removes the fear of the unknown. Demystifies AF ablation for the nurses/ radiographers!,Why CARTO rather than ESI?,Unmatched catheter stability no catheter dive with onset of

10、RF delivery Allows linear lesions No need for stable intracardiac reference Ability to perform activation mapping if needed Great CT image integration software,Advances with CARTO-3,Hybrid of impedance and magnetic catheter location Ability to see all catheters Ability to create fast anatomical maps

11、 Makes CT image integration easier More streamlined patient set-up,Why WACA?,PV ostial/ antral triggers Substrate modification by Atrial debulking Less risk of PV stenosis Quicker than segmental PVI Easy to anchor linear lesions on either side Et tu, Bordeaux?!,Why our RF settings?,Continuous RF: 35

12、 W, 50C, 10 ml/ min flow Quicker signal obliteration than 30/25 W Short procedure time (20-30 per WACA) Prevents peri-lesion edema (? reconnection risk) RF controlled by Foot pedal Frees up a cardiac physiologist Imposes discipline on use of X-ray pedal!,Our results,131 consecutive pts. between Jan

13、08-July 09,Individualised ablation strategy,True PAF (n=45) PVAI using WACA Sustained PAF (n=31) + LA roof line+ RA flutter line Ps AF (n=22) + LA floor line+ Mitral isthmus line Long standing Ps AF (n=33) + Epicardial CS ablation+ CAF ablation,In-lab results,All patients received prescribed minimum

14、 lesion set Mean Procedure time 173 min (98-300) Fluoroscopy times Mean 26.5 min (13-58) (as pre-CARTO 3 era) Now with CARTO-3 (n=36): Mean 14 min (6-21) Complications 1 tamponade (PVI group), 1 AV fistula,Our follow-up strategy,Antiarrhythmic drug therapy for 2-3 months Early post-op arrhythmias DC

15、 CV if sustained and poorly tolerated (n=1) No redo ablation procedure for at least 6 months Mean follow up 11.3 months (6-24),Our Clinical Results,Definition of Procedural Success: No symptoms beyond 3 months, AND Absence of AF/AT on 24 hour Holter at 6 mo Single procedure success rates at 6 months PAF 84% PsAF 86% Sustained PAF 77% (p=0.05) Long sta