The electrophysiological study for atrial tachycardia which seems to be of left atrial origin on body surface electrocardiogram.

Focal atrial tachycardia (AT) is a relatively uncommon cause of supraventricular tachycardia, but when present is frequently difficult to treat medically. Atrial tachycardias tend to originate from anatomically determined atrial sites. The P-wave morphology on surface electrocardiogram (ECG) together with more sophisticated contemporary mapping techniques facilitates precise localisation and ablation of these ectopic foci. Catheter ablation of focal AT is associated with high long-term success and may be viewed as a primary treatment strategy in symptomatic patients.

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The efficacy of class III D,L sotalol in treatment of left atrial tachycardia after pulmonary vein isolation

Orvosi Hetilap ◽

10.1556/oh.2009.28678 ◽

2009 ◽

Vol 150 (36) ◽

pp. 1694-1700 ◽

Cited By ~ 1

Author(s):

Attila Mihálcz ◽

Csaba Földesi ◽

Attila Kardos ◽

Károly Ladunga ◽

Tamás Szili-Török

Keyword(s):

Pulmonary Vein ◽

Pulmonary Vein Isolation ◽

Left Atrial ◽

Atrial Tachycardia ◽

Class Iii

Pitvarfibrilláció miatt végzett pulmonalis vena izolációját követően a betegek egy részénél iatrogén bal pitvari tachycardia jelentkezik. Cél: A sotalolterápia hatásosságának összehasonlítása az 1C tip. propafenonnal szemben, a postablatiós arrhythmiák kezelésében. Módszer és eredmények: A vizsgálatba 75, pitvarfibrillációban szenvedő beteget (átlagéletkor 55,4 ± 7,14 év) választottunk, akiknél a pulmonalis vénák valódi elektromos izolálását végeztük. A beavatkozás során az elektromos izolációt körkörös multipoláris katéterrel ellenőriztük. Az ablatiót követően folytattuk az antiarrhythmiás terápiát még minimum 6 hétig, de célunk annak leépítése volt. Az utánkövetést 1, majd 3 havonta tervezett, ambuláns vizsgálatok alapján végeztük. A 12. hónap végén 67 betegnél tudtuk a protokoll szerint gyűjtött adatokat elemezni. 21 betegnél jelentkezett 3 hónapot követően tartósan bal pitvari tachycardia (31,3%). 11 beteg propafenon-, 4 beteg amiodaron- és 6 beteg sotalolterápiában részesült. Az első két csoportnál sotalolterápiára váltottunk, míg az utolsó csoportnál propafenonterápiát kezdtünk. A 12. hónap végére a sotalol hatásossága 80%, a propafenon hatásossága 20% volt. Következtetések: Adataink alapján PV-izolációt követően a sotalolterápia nem hatásosabb a bal pitvari tachycardiák megelőzésében, mint a propafenon. A 3 hónapon túl fellépő postablatiós bal pitvari tachycardiák kezelésében a sotalol hatásosabb, mint az IC-csoportba tartozó propafenon.

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Faculty Opinions recommendation of Electrophysiologic and electrocardiographic characteristics and radiofrequency catheter ablation of focal atrial tachycardia originating from the left atrial appendage.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1091547.546030 ◽

2007 ◽

Author(s):

Raul Weiss

Keyword(s):

Catheter Ablation ◽

Left Atrial ◽

Radiofrequency Catheter Ablation ◽

Atrial Tachycardia ◽

Left Atrial Appendage ◽

Atrial Appendage ◽

Focal Atrial Tachycardia

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P318 Left atrial dysfunction assessed by echocardiography in relation to left atrial fibrosis in patients undergoing ablation for atrial fibrillation

European Heart Journal - Cardiovascular Imaging ◽

10.1093/ehjci/jez319.171 ◽

2020 ◽

Vol 21 (Supplement_1) ◽

Author(s):

E Pilichowska ◽

J Baran ◽

P Kulakowski ◽

B Zaborska

Keyword(s):

Atrial Fibrillation ◽

Left Atrial ◽

Systolic Function ◽

Electrophysiological Study ◽

Stiffness Index ◽

P Value ◽

Group 2 ◽

Left Atrial Dysfunction ◽

Left Atrial Fibrosis ◽

Group 1

Abstract PURPOSE Left atrial (LA) fibrosis is the hallmark of LA remodeling in atrial fibrillation (AF), alters LA function and may predict poor catheter ablation (CA) outcome. LA fibrosis may be assessed invasively using electroanatomical mapping (EAM) during electrophysiological study. The aim was to assess LA function parameters in relation to degree of LA fibrosis derived from EAM in patients with AF. METHODS Patients (pts) n = 39 (79% males, mean age 56+/-10) with non-valvular AF were studied with TTE and TEE before first CA during sinus rhythm. LA strain (LAS) and strain rate (LASR) were analyzed in reservoir (r), conduit (cd) and contractile (ct) phases. The velocities of mitral A, E" and A" were measured with Doppler. E/E" and LA stiffness index - the ratio of E/E" to LASr were assessed. LA appendage flow velocity (LAAv) was measured in TEE. LA volume using biplane area-length method was calculated. The EAM of LA was build using Carto System before CA. Low amplitude potentials area (LAPA) was quantitatively analyzed and expressed as a percentage of LA surface using the cut-off <0.5 mV to detect sites of fibrosis. LA parameters were compared between mild (LAPA <10%) moderate (LAPA 10-40%) and extensive degree of LA fibrosis (LAPA >40%) (table). RESULTS The mean LA volume was 35 ± 11 mL/m². The LAPA ranged from 2 to 78 % of LA surface. Reduced LA function was observed in the LAPA >40% group. Extensive LAPA altered mainly LA compliance parameters. Traditional LA systolic function parameters did not differ in relation to degree of LAPA. CONCLUSION LA compliance is mostly affected by LA fibrosis, thus LA diastolic parameters may be useful in the noninvasive assessment of LA fibrosis. Whether these parameters should be a part of the proper selection of candidates for CA requires further studies. LA function parameters LA parameters Group 1 LAPA <10% n = 13 Group 2 LAPA >10% <40% n = 13 Group 3 LAPA >40% n = 13 P-value Group 1 + 2 vs 3 Mitral A 0.55 ± 0.10 0.55 ± 0.24 0.73 ± 0.32 0.077 A" 9.19 ± 1.74 7.85 ± 1.43 7.92 ± 2.40 0.376 LASr 31.48 ± 4.52 26.48 ± 8.79 19.63 ± 6.76 <0.001 LAScd 17.30 ± 3.05 15.44 ± 6.93 10.91 ± 4.04 0.003 LASct 14.18 ± 5.36 11.05 ± 3.67 8.72 ± 4.78 0.024 LASRr 1.22 ± 0.19 1.24 ± 0.21 0.92 ± 0.20 <0.001 LASRct -1.71 ± 0.46 -1.37 ± 0.34 -1.04 ± 0.33 <0.001 LA stiffness 0.20 ± 0.07 0.34 ± 0.17 0.63 ± 0.29 <0.001 LAAv 0.83 ± 0.18 0.55 ± 0.17 0.60 ± 0.16 0.178

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