No abstract

No abstract

Both STc and SFc allowed a simplification of CA of paroxysmal AF. In addition, they reduced early PVs reconnection. Sixty-three patients with paroxysmal AF underwent ablation by standard ThermoCool, SmartTouch, or Surround Flow catheter. Both the SmartTouch and the Surround Flow significantly reduced radiofrequency and fluoroscopy times, as well as pulmonary veins reconnection rate at 30 min. Moreover, the SmartTouch reduced overall duration of the procedure.

AimsCatheter–tissue contact is critical for effective lesion creation in radiofrequency catheter ablation (RFCA). In a multicentre prospective study, we assessed the effect of direct contact force (CF) measurement on acute procedural parameters during RFCA of atrial fibrillation (AF).Methods and resultsA new open-irrigated tip catheter with CF sensing (SmartTouch™, Biosense Webster Inc.) was used. All the patients underwent the first ablation procedure for paroxysmal AF with antral pulmonary vein (PV) isolation, aiming at entry and exit conduction block in all PVs. Ninety-five patients were enroled in nine centres and successfully underwent ablation. Overall procedure time, fluoroscopy time, and ablation time were 138.0 ± 67.0, 14.3 ± 11.2, and 33.8 ± 19.4 min, respectively. The mean CF value during ablation was 12.2 ± 3.9 g. Force time integral (FTI) analysis showed that patients achieving a value below the median of 543.0gs required longer procedural (158.0 ± 74.0 vs. 117.0 ± 52.0 min, P = 0.004) and fluoroscopy (17.5 ± 13.0 vs. 11.0 ± 7.7 min, P = 0.007) times as compared with those in whom FTI was above this value. Patients in whom the mean CF during ablation was >20 g required shorter procedural time (92.0 ± 23.0 vs. 160.0 ± 67.0 min, P = 0.01) as compared with patients in whom this value was <10 g. Four groin haematomas were the only complications observed.ConclusionContact force during RFCA for PV isolation affects procedural parameters, in particular procedural and fluoroscopy times, without increasing complications.

Feasibility and clinical usefulness of high resolution sound map with cross plane method for AF ablation Yeong-Hwa CHUN (Eiwa Zen) (Japan) i1 OP 16-2 Robotic navigation for catheter ablation of atrial fibrillation-is there a learning curve? Fahd CHAHADI (Australia) i1 OP 16-3 Effect of atrial fibrillation on catheter-tissue contact during antral pulmonary vein isolation in humans: lower contact force at the left anterior pulmonary vein in atrial fibrillation compared to sinus or paced rhythm Saurabh KUMAR (Australia) i1 OP 16-4 First human validation of a new epicardial access needle with a real time pressure monitoring to facilitate epicardial access Luigi DI BIASE (United States of America) i1 OP 16-5 Endoscopic ablation by unilateral approach (left chest) for lone atrial fibrillation: a single center experience in 100 consecutive patients Ju MEI (China) ix OP 16-6 Exploring the relationship between contact force and clinical outcomes between human and robot-assisted AF ablation: early results of MAST-AF Gavin S CHU (United Kingdom) i2 AFL ABLATION OP 14-1 Effect of respiration on catheter movement and stability during cavotricuspid isthmus ablation for atrial flutter Saurabh KUMAR (Australia) i3 OP 14-2 Electroanatomic characterization and ablation outcome of nonlesion related left atrial macroreentrant tachycardiain patients without obvious structural heart disease Jinlin ZHANG (China) Pouch depth is the sole factor affecting the radiofrequency duration and energy for right atrial cavotricuspid isthmus catheter ablation Kazuto KUJIRA (Japan) i4 ALTERNATIVE SITE PACING OP 22-1 Getting RV lead at thinner part of interventricular septum tends to shorten paced QRS duration with less dyssynchrony Dmytro VOLKOV (Ukraine) i5 OP 22-2 Is right ventricular outflow tract (RVOT) septal pacing better than right ventricular apical (RVA) septal pacing with regard to long term left ventricular function and mechanical synchrony? Gaurav GANESHWALA (India) i5