31 research outputs found
Learning curve in circular multipolar phased radiofrequency ablation of atrial fibrillation
Background: Although atrial fibrillation (AF) ablation is considered a technically challenging procedure, studies on the learning curve of different pulmonary vein isolation (PVI) techniques are limited. We investigated the time-dependent changes in procedural parameters, complication rates, and in the 1-year clinical outcome during our initial experience with circular multipolar phased radiofrequency (RF) ablation.
Methods and results: The first 132 consecutive patients (40 female; age: 56.6 ± 10.4 years) who underwent PVI with phased RF ablation for paroxysmal or persistent AF at our center were included in the study. Procedural parameters and atrial arrhythmia-free survival were compared in the first, second and third group of 44 successive patients. All pulmonary veins were successfully isolated in 44 (100%), 41 (93.8%) and 42 (95.5%) patients in Tierce 1, 2 and 3, respectively (p = 0.233). The number of RF applications (per vein) required for isolation and fluoroscopy times demonstrated a significant decrease with experience, and a trend towards lower procedure times in Tierces 2 and 3 was also observed. Atrial arrhythmia-free survival rates at 12 months postablation were 68.18%, 75%, and 70.75% in Tierce 1, Tierce 2 and Tierce 3, respectively (p = 0.772). Pericardial tamponade requiring percutaneous subxiÂphoid drainage occurred in 1 patient (Tierce 3) as the only significant procedural complication.
Conclusions: A learning curve effect was demonstrated in fluoroscopy times and in the number of RF applications but not in the acute success and in the long-term arrhythmia-free survival with circular multipolar RF ablations.
A kardiális kontraktilitás moduláciĂłjával elĂ©rt bal kamrai reverz remodelling egy dilatatĂv cardiomyopathiás betegben = Cardiac contractility modulation induced left ventricular reverse remodelling in a patients with dilated cardio¬myopathy
DilatatĂv cardiomyopathia talaján kialakult, sĂşlyosan csökkent balkamra- (BK-) funkciĂłval (EF: 30%) járĂł szĂvelĂ©gtelensĂ©g miatt kardiáliskontraktilitás-modulátor (CCM) pacemakert implantáltunk egy 65 Ă©ves fĂ©rfinak, keskeny QRS-komplex Ă©s optimális gyĂłgyszeres kezelĂ©s ellenĂ©re perzisztálĂł NYHA III panaszok mellett. BetegĂĽnk esetĂ©ben a szĂvkontraktilitás-moduláciĂł reverz remodellinget eredmĂ©nyezett, amit a BK-funkciĂł növekedĂ©se (EF: 46%), a BK vĂ©gszisztolĂ©s tĂ©rfogatának (ESV) >15%-os csökkenĂ©se, valamint a funkcionális kapacitás javulása (NYHA I) reprezentált. CCMpacemaker beĂĽltetĂ©se szĂłba jöhet optimális gyĂłgyszeres terápia mellett 25-45% közötti EF-jĂş, NYHA II-III funkcionális stádiumĂş, iszkĂ©miás, vagy noniszkĂ©miás etiolĂłgiájĂş szĂvelĂ©gtelen betegek számára, ahol a CRT kritĂ©riumai nem teljesĂĽlnek, vagy CRT nonrespondernek bizonyultak