- Publikační typ
- abstrakt z konference MeSH
Úvod: Thorakoskopická radiofrekvenční ablace technikou "single stage" je metodou léčby perzistující a dlouhodobě perzistující fibrilace síní (FS) nabízející možnost pro pacienty jinak neřešitelné konvenční katétrovou radiofrekvenční ablací. Prezentujeme úvodní soubor pacientů po zavedení nové metody na našem pracovišti. Metody: Celkem 52 pacientů ve věku 61,82 ± 9,7 roku podstoupilo v období září 2016 – březen 2019 single stage hybridní ablaci (thorakoskopická izolace plicních žil a „box lesion“ následovaná katétrovým ověřením efektu chirurgické části výkonu) pro symptomatickou perzistující a dlouhodobě perzistující FS s výrazně dilatovanou levou síní 57,9 ± 11,0 mm. Výsledky: Střední doba výkonu dosahovala 232 minut a střední doba hospitalizace byla 10 dnů. Při propuštění mělo 52 pacientů (100 %) sinusový rytmus. Šestiměsíční kontrolu absolvovalo 48 z 52 pacientů (92,3 %). Při první kontrole po třech měsících od výkonu bylo 41 ze 48 (85,4 %) pacientů bez záchytu FS, při druhé kontrole po 6 měsících bylo bez FS 38 ze 44 dále sledovaných pacientů (86,4). Akutní komplikace byla zaznamenána 1× perforace levé síně řešená úspěšně suturou a 1× tranzitorní ischemická ataka bez trvalých následků. Pozdní komplikace 1× masivní plicní embolizace, 1× atrioezofageální píštěl. Nebyl zaznamenán žádný periprocedurální infarkt myokardu ani cévní mozková příhoda s trvalými následky. Závěr: Hybridní thorakoskopická a katétrová ablace v jednom sezení je účinná a relativně bezpečná miniinvazivní metoda léčby dlouhodobě perzistující fibrilace síní.
Introduction: Single stage thoracoscopic radiofrequency ablation (RFA) is a treatment method for persistent and long-term persistent atrial fibrillation (AF) offering the possibility for patients otherwise inconsolable by conventional catheter RFA. We present a pilot group of patients after the introduction of the new method at our clinical center. Patients group: A total of 52 patients aged 61.82 ± 9.7 years underwent single stage hybrid ablation (thoracoscopic isolation of pulmonary veins and box lesion followed by catheter verification of the surgical procedure effectivness) for symptomatic persistent and long-term persistent AF with significantly dilated left atrium 57.9 ± 11.0mm in the period September 2016-March 2019. Results: The median duration of the procedure was 232 minutes and the median duration of hospitalization was 10 days. At discharge, 52 patients (100%) had sinus rhythm. 48 of 52 patients (92.3%) had a 6-month follow-up. 41 of 48 (85.4%) and 38 of 44 (86.4%) of patients were AF free at 3-month and 6-month follow-up, respectively. Acute complications were: one left atrial perforation resolved successfully by suture and one transient ischaemic attack without permanent sequelae. Late complications involved one massive pulmonary embolization and an atrioesophageal fistula. There was no periprocedural myocardial infarction or stroke with permanent sequelae. Conclusion: Hybrid thoracoscopic-catheter ablation performed during one procedure is an effective and relatively safe mini-invasive method of treatment for long-term persistent atrial fibrillation.
- Klíčová slova
- thorakoskopická ablace, hybridní single stage ablace,
- MeSH
- fibrilace síní * chirurgie MeSH
- katetrizační ablace metody MeSH
- lidé středního věku MeSH
- lidé MeSH
- retrospektivní studie MeSH
- senioři MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- senioři MeSH
- Publikační typ
- práce podpořená grantem MeSH
BACKGROUND AND PURPOSE: Saline-irrigated radiofrequency ablation (RFA) for atrial fibrillation (AF) is limited by the absence of reliable thermal feedback limiting the utility of temperature monitoring for power titration. The DiamondTemp (DT) ablation catheter was designed to allow efficient temperature-controlled irrigated ablation. We sought to assess the 1-year clinical safety and efficacy of the DT catheter in treating drug-refractory paroxysmal AF. METHODS: The TRAC-AF trial (NCT02821351) is a prospective, multi-center (n = 4), single-arm study which enrolled patients with symptomatic, drug-refractory, paroxysmal AF. Using the DT catheter, point-by-point ablation was performed around all pulmonary veins (PVs) to achieve PV isolation (PVI). Ablation was performed in a temperature-controlled mode (60 °C, max 50 W). Acute and chronic efficacy and safety was evaluated. RESULTS: Seventy-one patients (age 69.9 ± 11.0 years; 60.6% male) were ablated using the DT catheter. The mean fluoroscopy and RF ablation times were 9.3 ± 6.1 min and 20.6 ± 8.9 min, respectively. Acute isolation of all PVs was achieved in 100% of patients, and freedom from AF after 1 year was 70.6%. There were no steam pops, char, or coagulum on the catheter tip after ablation. There were few serious procedure/device-related adverse events including a single case of cardiac tamponade (1.4%) and transient ischemic attack (1.4). CONCLUSION: This first in man series demonstrates that temperature-controlled irrigated RFA with the DT catheter is efficient, safe, and effective in the treatment of paroxysmal AF. Randomized controlled trials are ongoing and will evaluate better the role of this catheter in relation to standard RFA. TRIAL REGISTRATION: Registered on the site ClinicalTrials.gov January 2016 with identifier: NCT02821351.
- MeSH
- design vybavení MeSH
- fibrilace síní * MeSH
- katetrizační ablace * škodlivé účinky MeSH
- lidé středního věku MeSH
- lidé MeSH
- prospektivní studie MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- teplota MeSH
- venae pulmonales * chirurgie MeSH
- výsledek terapie MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- klinické zkoušky MeSH
- multicentrická studie MeSH
(1) Background: Computer tomography (CT) is an imaging modality used in the pre-planning of radiofrequency catheter ablation (RFA) procedure in patients with cardiac arrhythmias. However, it is associated with a considerable ionizing radiation dose for patients. This study aims to develop and validate low-dose CT scanning protocols of the left atrium (LA) for RFA guidance. (2) Methods: 68 patients scheduled for RFA of atrial fibrillation were sequentially assigned to four groups of ECG-gated scanning protocols, based on the set tube current (TC): Group A (n = 20, TC = 33 mAs), Group B (n = 18, TC = 67 mAs), Group C (n = 10, TC = 135 mAs), and control Group D (n = 20, TC = 600 mAs). We used a 256-row multidetector CT with body weight-dependent tube voltage of 80 kVp (<70 kg), 100 kVp (70-90 kg), and 120 kVp (>90 kg). We evaluated scanning parameters including radiation dose, total scanning procedure time and signal-to-noise ratio (SNR). (3) Results: The average effective radiation dose (ED) was lower in Group A in comparison to Group B, C and D (0.83 (0.76-1.10), 1.55 (1.36-1.67), 2.91 (2.32-2.96) and 9.35 (8.00-10.04) mSv, p < 0.05). The total amount of contrast media was not significantly different between groups. The mean SNR was 6.5 (5.8-7.3), 7.1 (5.7-8.2), 10.8 (10.1-11.3), and 12.2 (9.9-15.7) for Group A, B, C and D, respectively. The comparisons of SNR in group A vs. B and C vs. D were without significant differences. (4) Conclusions: Optimized pre-ablation CT scanning protocols of the LA can reduce an average ED by 88.7%. Three dimensional (3D) models created with the lowest radiation protocol are useful for the integration of electro-anatomic-guided RFA procedures.
- Publikační typ
- časopisecké články MeSH
Hypertrofická obstrukční kardiomyopatie je charakterizována ztluštěním stěn a zvětšením masy myokardu nedilatované levé komory srdeční bez vysvětlujících hemodynamických příčin a přítomnosti obstrukce ve výtokovém traktu levé komory. V minulosti byla invazivní nefarmakologickou metodou volby k redukci septální hypertrofie chirurgická myektomie, kterou v devadesátých letech vystřídala alkoholová septální ablace, nyní všeobecně užívaná, bezpečná a účinná metoda v redukci septální hypertrofie. Toto review se zabývá novou metodu používanou v redukci septální hypertrofie, kterou je endokardiální radiofrekvenční ablace septální hypertrofie (ERASH). Naše práce shrnuje dosud publikované studie a srovnává jejich výsledky s jinými metodami redukce septální hypertrofie. ERASH se jeví jako srovnatelně účinná a bezpečná metoda jako alkoholová septální ablace se srovnatelným poklesem gradientu ve výtokovém traktu levé komory a subjektivním zlepšením stavu pacienta charakterizovaným poklesem v třídě NYHA.
Hypertrophic obstructive cardiomyopathy is characterized by abnormal thickening or enlargement of the left ventricular myocardium mass of non-dilated left ventricle not explained solely by loading conditions and presence of obstruction in outflow tract of left ventricle. Surgical septal myectomy was the first choice method of invasive treatment of septal hypertrophy in the past which was replaced by alcohol septal abla- tion in the nineties of the 20th century and nowadays it is still worldwide used, safe, and effective method in reduction of septal hypertrophy. This review introduces and describes new method in invasive reduction of septal hypertrophy which is endo- cardial radiofrequency ablation of septal hypertrophy. Our review summarizes all so far published studies and compares this new method with other methods of invasive reduction of septal hypertrophy. Endocardial radiofrequency ablation of septal hypertrophy seems to be comparably safe and effective in comparison to alcohol septal ablation with comparable decrease of left ventricle outflow tract gradient and also subjective improvement of a patient characterized by NYHA class.
- Klíčová slova
- gradient ve výtokovém traktu levé komory,
- MeSH
- ablace * dějiny metody škodlivé účinky MeSH
- atrioventrikulární blokáda etiologie MeSH
- hypertrofická kardiomyopatie * chirurgie dějiny diagnostické zobrazování farmakoterapie mortalita patologie terapie MeSH
- kardiomegalie chirurgie etiologie terapie MeSH
- katetrizační ablace metody MeSH
- klinická studie jako téma MeSH
- lidé MeSH
- radiofrekvenční ablace dějiny metody MeSH
- radiofrekvenční terapie metody MeSH
- riziko MeSH
- výsledek terapie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- práce podpořená grantem MeSH
- přehledy MeSH
AIMS: Interventional cardiology procedures may expose patients and staff to considerable radiation doses. We aimed to assess whether exposure to ionizing radiation during catheter ablation of supraventricular tachycardia (SVT) can be completely avoided. METHODS AND RESULTS: In this prospective randomized study, patients with SVT (atrioventricular re-entrant tachycardia n = 94, typical atrial flutter n = 29) were randomly assigned in a 1:1 ratio to catheter ablation with conventional fluoroscopic guidance (CF group) or with the EnSite Precision mapping system [zerofluoro (ZF) group]. Acute procedural parameters, increased stochastic risk of cancer incidence and 6-month follow-up data were assessed. Between May 2019 and August 2020, 123 patients were enrolled. Clinical parameters were comparable. Median procedural time was 60.0 and 58.0 min, median fluoroscopy time and estimated median effective dose were 240 s vs. 0 and 0.38 mSv vs. 0 and arrhythmia recurrence was 5% and 7.9% in the CF and ZF groups, respectively. The acute success rate was 98.4% in both groups. No procedure-related complications were reported. At an average age of 55.5 years and median radiation exposure of 0.38 mSv, the estimate of increased incidence was approximately 1 in 14 084. The estimated mortality rate was 1 per 17 857 exposed persons. CONCLUSIONS: The procedural safety and efficacy of the zero-fluoroscopic approach are similar to those of conventional fluoroscopy-based ablation for atrioventricular nodal re-entrant tachycardia and atrial flutter. Under the assumption of low radiation dose, the excessive lifetime risk of malignancy in the CF group due to electrophysiology procedure is reasonably small, whilst totally reduced in zero fluoroscopy procedures.
- MeSH
- atrioventrikulární nodální reentry tachykardie * diagnostické zobrazování chirurgie MeSH
- fluoroskopie metody MeSH
- flutter síní * diagnostické zobrazování chirurgie MeSH
- katetrizační ablace * škodlivé účinky metody MeSH
- lidé středního věku MeSH
- lidé MeSH
- nodus atrioventricularis MeSH
- prospektivní studie MeSH
- srdeční arytmie chirurgie MeSH
- supraventrikulární tachykardie * diagnostické zobrazování chirurgie MeSH
- výsledek terapie MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- randomizované kontrolované studie MeSH
Intracardiac echocardiography (ICE) is the most practical method for online imaging during electrophysiological procedures. It allows guiding of complex catheter ablation procedures together with electroanatomical mapping systems, either with minimal or with zero fluoroscopy exposure. Besides safe and reproducible transseptal puncture, ICE helps to assess location and contact of the tip of the ablation catheter relative to specific anatomical structures. Another option is visualization of the arrhythmogenic substrate in patients with ventricular arrhythmias. This article describes the clinical utility of ICE in non-fluoroscopic electrophysiology procedures more in detail.
- MeSH
- chirurgie s pomocí počítače metody MeSH
- echokardiografie metody MeSH
- elektrofyziologické techniky kardiologické metody MeSH
- fluoroskopie MeSH
- katetrizační ablace metody MeSH
- lidé MeSH
- srdce diagnostické zobrazování MeSH
- srdeční arytmie diagnostické zobrazování chirurgie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- přehledy MeSH
AIMS: This study aims to compare procedural parameters and clinical efficacy of remote magnetic navigation (RMN) vs. manual navigation (MAN) approach for radiofrequency ablation (RFA) in patients with atrial fibrillation (AF). METHODS: 146 patients with AF were enrolled in the study. In the RMN group (n=57), patients were treated with the CARTO® 3 in combination with the Niobe ES system. In the MAN group (n=89), ablation was performed with the EnSite Velocity and TactiCath™ Quartz catheter with direct contact force measurement. Procedural time, ablation time, fluoroscopy time, radiation dose and ablation counts were measured and compared between the groups. Recurrence of AF was evaluated after 6 months of follow-up. RESULTS: Mean procedure times (236.87±64.31 vs. 147.22±45.19 min, P<0.05), counts of RF applications (74.30±24.77 vs. 49.15±20.33, P<0.05) and total RFA times (4323.39±1426.69 vs. 2780.53±1157.85 s, P<0.05) were all significantly higher in the RMN than in the MAN group, respectively. In the same order, mean X-ray dose (9722.6±7507.4 vs. 8087.9±6051.5 mGy/cm2, P=0.12) and mean total X-ray exposure time (8.07±4.20 vs. 9.54±5.47 min, P=0.08) were not statistically different. At 6-month follow-up, freedom from AF was similar in RMN and MAN group for paroxysmal (60.8% and 73%, respectively, P=0.42) and persistent AF (69.6% and 75.0%, respectively, P=0.77). CONCLUSIONS: Due to the fact that mid-term clinical outcomes showed no significant differences in AF recurrences between groups and manual ablation strategy provided more favorable results regarding acute procedural parameters, we can conclude that the remote magnetic navigation is not superior to the manual approach.
- MeSH
- chirurgické navigační systémy statistika a číselné údaje MeSH
- elektrofyziologické techniky kardiologické metody statistika a číselné údaje MeSH
- fibrilace síní chirurgie MeSH
- lidé středního věku MeSH
- lidé MeSH
- radiofrekvenční ablace metody statistika a číselné údaje MeSH
- retrospektivní studie MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- výsledek terapie * MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- srovnávací studie MeSH
INTRODUCTION: Despite technical progress, ventricular tachycardia (VT) recurrence after unipolar ablation remains relatively high (12%-47%). Bipolar ablation has been proposed as an appealing solution that may overcome limitations associated with unipolar ablation settings. We designed an animal study to compare bipolar (BPA) vs sequential unipolar ablation (UPA) using contact force-sensing technology on both ablation catheters. METHODS: Twenty large white female pigs (6-months-old, 50-60 kg) underwent multiple RF ablations (30 W, 60 seconds, 30 mL/min irrigation) on the ventricular myocardium from the epicardial and endocardial sides. The hearts were fixed and scanned with high-resolution cardiac magnetic resonance imaging. Thermal lesions were located and characterized in volume, depth, width, and transmurality. RESULTS: Lesion volume was calculated as the sum of epicardial or endocardial conjoined/isolated lesions at one location. Linear dimensions (width and depth) were measured twice for each location, on the endocardial and epicardial side. We evaluated 35 lesions across the intraventricular septum (UPA, N = 17 vs BPA, N = 18). No difference in volume, linear dimensions or impedance drop was observed in this area between UPA and BPA. However, BPA required half RF time and showed an increased transmurality trend. We then analyzed 73 lesions from the endocardial side (UPA, N = 35 vs BPA, N = 38) and 50 from the epicardial side (UPA, N = 11 vs BPA N = 39) of the ventricular free walls. Lesion transmurality was markedly improved by BPA (P = .030, odds ratio, 23.73 [4.71,31.96]). Ventricular BPA lesions were significantly deeper on the epicardial side (P < .0001) and endocardial side (P = .015). CONCLUSION: Bipolar ablation is more likely to create transmural and epicardial lesions in the ventricle wall. Half the time is needed for the creation of comparably deep and large lesions.
- MeSH
- design vybavení MeSH
- katetrizační ablace škodlivé účinky přístrojové vybavení MeSH
- magnetická rezonanční tomografie MeSH
- měniče tlakové * MeSH
- myokard patologie MeSH
- srdeční katétry * MeSH
- srdeční komory diagnostické zobrazování patologie chirurgie MeSH
- Sus scrofa MeSH
- zvířata MeSH
- Check Tag
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- srovnávací studie MeSH
- MeSH
- chirurgie s pomocí počítače metody MeSH
- fibrilace síní diagnóza chirurgie MeSH
- katetrizační ablace metody MeSH
- lidé MeSH
- mapování potenciálů tělesného povrchu metody MeSH
- myokard MeSH
- srdeční komory diagnostické zobrazování patofyziologie chirurgie MeSH
- zobrazování trojrozměrné * MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- dopisy MeSH
- práce podpořená grantem MeSH