{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T09:49:51Z","timestamp":1790934591415,"version":"4.1.0"},"reference-count":13,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"6","content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Circulation"],"published-print":{"date-parts":[[2000,2,15]]},"abstract":"<jats:p>\n                    <jats:italic>Background<\/jats:italic>\n                    \u2014Dual-loop atrial reentrant tachycardias have not been clinically described.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic>Methods and Results<\/jats:italic>\n                    \u2014Five patients (3 men, 2 women; mean age, 48\u00b116 years) were studied 24\u00b115 years after surgical closure of an ostium secundum atrial septal defect for drug-resistant atrial tachycardia. Complete tachycardia mapping was performed in the right atrium with multipolar catheters and a 3-dimensional electroanatomic mapping system (Biosense), followed by linear radiofrequency ablation of the narrowest part of each complete loop. Six tachycardias with a typical flutter morphology, a cycle length of 262\u00b140 ms, and a superior f-wave axis (\u221277\u00b111\u00b0) were mapped, 4 with a Biosense map including 106\u00b132 points. Five figure-8 tachycardias had a counterclockwise loop around the tricuspid valve sharing a common anterior channel with a clockwise loop around the lateral atriotomy scar. One tachycardia was thought to have 2 counterclockwise loops around the same obstacles. Radiofrequency delivery in the cavotricuspid isthmus in each case transformed the tachycardia without any pause in a different morphology tachycardia with an inferior P-wave axis (50\u00b142\u00b0) and nearly the same cycle length (272\u00b139 ms) but with the periatriotomy loop alone. This arrhythmia required ablation of a second isthmus: between the lower end of the atriotomy and the inferior vena cava in 4 and the superior tricuspid annulus in 1. After a follow-up of 19\u00b16 months, there were no recurrences.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:italic>Conclusions<\/jats:italic>\n                    \u2014Figure-8 double-loop tachycardias mimicking the ECG pattern of a common atrial flutter occur in some patients after a surgical atriotomy. Ablation of 1 loop produces a sudden transformation to a new reentrant tachycardia formed of the remaining loop that requires ablation at a second isthmus.\n                  <\/jats:p>","DOI":"10.1161\/01.cir.101.6.631","type":"journal-article","created":{"date-parts":[[2012,6,11]],"date-time":"2012-06-11T20:42:29Z","timestamp":1339447349000},"page":"631-639","update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":115,"title":["Dual-Loop Intra-Atrial Reentry in Humans"],"prefix":"10.1161","volume":"101","author":[{"given":"Dipen","family":"Shah","sequence":"first","affiliation":[{"name":"From the Department de Rhythmologie, Ho\u0302pital Cardiologique du Haut-Le\u0301ve\u0302que, Bordeaux-Pessac, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pierre","family":"Jai\u0308s","sequence":"additional","affiliation":[{"name":"From the Department de Rhythmologie, Ho\u0302pital Cardiologique du Haut-Le\u0301ve\u0302que, Bordeaux-Pessac, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Atsushi","family":"Takahashi","sequence":"additional","affiliation":[{"name":"From the Department de Rhythmologie, Ho\u0302pital Cardiologique du Haut-Le\u0301ve\u0302que, Bordeaux-Pessac, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Meleze","family":"Hocini","sequence":"additional","affiliation":[{"name":"From the Department de Rhythmologie, Ho\u0302pital Cardiologique du Haut-Le\u0301ve\u0302que, Bordeaux-Pessac, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing Tian","family":"Peng","sequence":"additional","affiliation":[{"name":"From the Department de Rhythmologie, Ho\u0302pital Cardiologique du Haut-Le\u0301ve\u0302que, Bordeaux-Pessac, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jacques","family":"Clementy","sequence":"additional","affiliation":[{"name":"From the Department de Rhythmologie, Ho\u0302pital Cardiologique du Haut-Le\u0301ve\u0302que, Bordeaux-Pessac, France."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michel","family":"Hai\u0308ssaguerre","sequence":"additional","affiliation":[{"name":"From the Department de Rhythmologie, Ho\u0302pital Cardiologique du Haut-Le\u0301ve\u0302que, Bordeaux-Pessac, France."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","reference":[{"key":"e_1_3_2_1_2","first-page":"1","volume":"47","year":"1906","unstructured":"Mayer AG. Rhythmical pulsation in scypho-medusae. Carnegie Inst Pub. 1906;47:1\u201362.","journal-title":"Carnegie Inst Pub"},{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(93)91014-9"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.86.4.1394929"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.93.2.284"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.68.3.644"},{"key":"e_1_3_2_6_2","unstructured":"El Sherif N Restivo M Gough WB. The figure of eight model of reentrant ventricular rhythms in the subacute phase of myocardial infarction. In: Shenasa M Borggrefe M Breithardt G eds. Cardiac Mapping. Mount Kisco NY: Futura Publishing Co; 1993:159\u2013182."},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0735-1097(87)80344-3"},{"key":"e_1_3_2_8_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8159.1999.tb00449.x"},{"key":"e_1_3_2_9_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.95.6.1611"},{"key":"e_1_3_2_10_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.96.11.3904"},{"key":"e_1_3_2_11_2","doi-asserted-by":"publisher","DOI":"10.1161\/circ.99.2.211"},{"key":"e_1_3_2_12_2","doi-asserted-by":"crossref","unstructured":"Brugada J Boersma L Kirchhof C Zetelaki Z Hoshiar A Konings K Allessie M. Sustained monomorphic ventricular tachycardia: a single electrocardiographic expression of different patterns of reentry. Pacing Clin Electrophysiol. 1991;14(suppl II):II-1943\u2013II-1946.","DOI":"10.1111\/j.1540-8159.1991.tb02794.x"},{"key":"e_1_3_2_13_2","doi-asserted-by":"publisher","DOI":"10.1161\/res.67.1.2364495"}],"container-title":["Circulation"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ahajournals.org\/doi\/full\/10.1161\/01.CIR.101.6.631","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,5,12]],"date-time":"2024-05-12T09:04:45Z","timestamp":1715504685000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ahajournals.org\/doi\/10.1161\/01.CIR.101.6.631"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2000,2,15]]},"references-count":13,"journal-issue":{"issue":"6","published-print":{"date-parts":[[2000,2,15]]}},"alternative-id":["10.1161\/01.CIR.101.6.631"],"URL":"https:\/\/doi.org\/10.1161\/01.cir.101.6.631","relation":{},"ISSN":["0009-7322","1524-4539"],"issn-type":[{"value":"0009-7322","type":"print"},{"value":"1524-4539","type":"electronic"}],"subject":[],"published":{"date-parts":[[2000,2,15]]},"assertion":[{"value":"1999-04-26","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"1999-09-15","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2000-02-15","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}