{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,5]],"date-time":"2026-11-05T12:12:58Z","timestamp":1793880778790,"version":"4.7.0"},"reference-count":27,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"3","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circulation"],"published-print":{"date-parts":[[1996,8]]},"abstract":"<jats:p>\n                    <jats:italic>Background<\/jats:italic>\n                    In patients with Ebstein's anomaly, localization of accessory pathways (APs) may be impeded by abnormal local electrograms recorded along the atrialized right ventricle and by the presence of multiple APs. The impact of these factors on radiofrequency (RF) current catheter ablation of APs has not been evaluated yet.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic>Methods and Results<\/jats:italic>\n                    Twenty-one patients with Ebstein's anomaly and reentrant atrioventricular tachycardias underwent electrophysiological evaluation and subsequent attempts at RF catheter ablation. Thirty-four right-sided APs were found, with 30 located along the atrialized ventricle. Local electrograms in this region were normal in 10 patients but fragmented in 11. Fragmented electrograms prevented the clear distinction between atrial and ventricular activation potentials as well as the identification of AP potentials. Right coronary artery mapping was performed in 7 patients. Abolition of all 26 APs was achieved in the 10 patients with normal local electrograms and in 6 of 11 patients with abnormal electrograms. Right coronary artery mapping allowed AP localization and ablation in 5 patients. In the 5 patients with abnormal electrograms and a total of 8 APs, 6 APs could not be ablated. Unsuccessfully treated patients received antiarrhythmic drugs. During 22\u00b112 months of follow-up, 5 patients had clinical recurrences, including 4 who had undergone a successful RF procedure.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic>Conclusions<\/jats:italic>\n                    In patients with Ebstein's anomaly and reentrant atrioventricular tachycardias, factors likely to account for failure of RF catheter ablation include an AP located along the atrialized right ventricle and the abnormal morphology of endocardial activation potentials generated in this region.\n                  <\/jats:p>","DOI":"10.1161\/01.cir.94.3.376","type":"journal-article","created":{"date-parts":[[2012,6,11]],"date-time":"2012-06-11T20:34:42Z","timestamp":1339446882000},"page":"376-383","update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":135,"title":["Radiofrequency Current Catheter Ablation of Accessory Atrioventricular Pathways in Ebstein's Anomaly"],"prefix":"10.1161","volume":"94","author":[{"given":"Riccardo","family":"Cappato","sequence":"first","affiliation":[{"name":"the Departments of Cardiology, St Georg Hospital (R.C., M.S., K.-H.K.) and University Hospital Eppendorf (C.W., M.A., D.H.K., T.H.), Hamburg, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Schlu\u00a8ter","sequence":"additional","affiliation":[{"name":"the Departments of Cardiology, St Georg Hospital (R.C., M.S., K.-H.K.) and University Hospital Eppendorf (C.W., M.A., D.H.K., T.H.), Hamburg, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"Wei\u00df","sequence":"additional","affiliation":[{"name":"the Departments of Cardiology, St Georg Hospital (R.C., M.S., K.-H.K.) and University Hospital Eppendorf (C.W., M.A., D.H.K., T.H.), Hamburg, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthias","family":"Antz","sequence":"additional","affiliation":[{"name":"the Departments of Cardiology, St Georg Hospital (R.C., M.S., K.-H.K.) and University Hospital Eppendorf (C.W., M.A., D.H.K., T.H.), Hamburg, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dietmar H.","family":"Koschyk","sequence":"additional","affiliation":[{"name":"the Departments of Cardiology, St Georg Hospital (R.C., M.S., K.-H.K.) and University Hospital Eppendorf (C.W., M.A., D.H.K., T.H.), Hamburg, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Hofmann","sequence":"additional","affiliation":[{"name":"the Departments of Cardiology, St Georg Hospital (R.C., M.S., K.-H.K.) and University Hospital Eppendorf (C.W., M.A., D.H.K., T.H.), Hamburg, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karl-Heinz","family":"Kuck","sequence":"additional","affiliation":[{"name":"the Departments of Cardiology, St Georg Hospital (R.C., M.S., K.-H.K.) and University Hospital Eppendorf (C.W., M.A., D.H.K., T.H.), Hamburg, Germany."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","reference":[{"key":"e_1_3_2_1_2","unstructured":"Ebstein W. U\u00a8ber einen sehr seltenen Fall von Insuffizienz der Valvula tricuspidalis bedingt durch eine angeborene hochgradige Missbildung derselben. Arch Anat Physiol Wissensch Med. 1866:238."},{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(58)90232-7"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1097\/00000441-195111000-00011"},{"key":"e_1_3_2_4_2","first-page":"174","volume":"54","year":"1979","unstructured":"Anderson KR, Zuberbuhler JR, Anderson RH, Becker AE, Lie JT. Morphologic spectrum of Ebstein's anomaly of the heart: a review. Mayo Clin Proc. 1979;54:174-180.","journal-title":"Mayo Clin Proc"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.57.5.639209"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1136\/hrt.36.5.417"},{"key":"e_1_3_2_7_2","first-page":"395","volume":"63","year":"1967","unstructured":"Genton E, Blount SG Jr. The spectrum of Ebstein's anomaly. 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