{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T00:57:53Z","timestamp":1790470673875,"version":"4.1.0"},"reference-count":16,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2021,5,12]],"date-time":"2021-05-12T00:00:00Z","timestamp":1620777600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pacing Clinical Electrophis"],"published-print":{"date-parts":[[2021,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Conventional bipolar electrodes (CBE) may be suboptimal to detect local abnormal ventricular activities (LAVAs). Microelectrodes (ME) may improve the detection of LAVAs. This study sought to elucidate the detectability of LAVAs using ME compared with CBE in patients with scar\u2010related ventricular tachycardia (VT).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We included consecutive patients with structural heart disease who underwent radiofrequency catheter ablation for scar\u2010related VT using either of the following catheters equipped with ME: QDOTTM or IntellaTip MIFITM.\u00a0Detection field of LAVA potentials were classified as three types: Type 1 (both CBE and ME detected LAVA), Type 2 (CBE did not detect LAVA while ME did), and Type 3 (CBE detected LAVA while ME did not).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In 16 patients (68 \u00b1 16 years; 14 males), 260 LAVAs electrograms (QDOT\u00a0=\u00a072; MIFI\u00a0=\u00a0188) were analyzed. Type 1, type 2, and type 3 detections were 70.8% (QDOT, 69.4%; MIFI, 71.3%), 20.0% (QDOT, 23.6%; MIFI, 18.6%) and 9.2% (QDOT, 6.9%; MIFI, 10.1%), respectively. The LAVAs amplitudes detected by ME were higher than those detected by CBE in both catheters (QDOT: ME 0.79 \u00b1 0.50\u00a0mV vs. CBE 0.41 \u00b1 0.42\u00a0mV, <jats:italic>p<\/jats:italic>\u00a0=\u00a0.001; MIFI: ME 0.73 \u00b1 0.64\u00a0mV vs. CBE 0.38 \u00b1 0.36\u00a0mV, <jats:italic>p<\/jats:italic>\u00a0&lt;\u00a0.001).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>ME allow to identify 20% of LAVAs missed by CBE. ME showed higher amplitude LAVAs than CBE. However, 9.2% of LAVAs can still be missed by ME.<\/jats:p><\/jats:sec>","DOI":"10.1111\/pace.14253","type":"journal-article","created":{"date-parts":[[2021,5,1]],"date-time":"2021-05-01T13:53:46Z","timestamp":1619877226000},"page":"1075-1084","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Local abnormal ventricular activity detection in scar\u2010related VT: Microelectrode versus conventional bipolar electrode"],"prefix":"10.1111","volume":"44","author":[{"given":"Takashi","family":"Nakashima","sequence":"first","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ghassen","family":"Cheniti","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takamitsu","family":"Takagi","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Konstantinos","family":"Vlachos","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"},{"name":"Department of Cardiac Pacing and Electrophysiology Evangelismos General Hospital of Athens  Athens Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cyril","family":"Goujeau","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cl\u00e9mentine","family":"Andr\u00e9","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philipp","family":"Krisai","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F. Daniel","family":"Ramirez","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"},{"name":"Division of Cardiology University of Ottawa Heart Institute  Ottawa Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gabriela","family":"Pintican","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tsukasa","family":"Kamakura","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yosuke","family":"Nakatani","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elodie","family":"Surget","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean\u2010Rodolphe","family":"Roux","sequence":"additional","affiliation":[{"name":"Biosense Webster  Bordeaux Aquitaine France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Valentin","family":"Meillet","sequence":"additional","affiliation":[{"name":"Biosense Webster  Bordeaux Aquitaine France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aline","family":"Carapezzi","sequence":"additional","affiliation":[{"name":"Boston Scientific  Bordeaux Aquitaine France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Romain","family":"Tixier","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Remi","family":"Chauvel","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Pambrun","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Josselin","family":"Duchateau","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicolas","family":"Derval","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xavier","family":"Pillois","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hubert","family":"Cochet","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M\u00e9l\u00e8ze","family":"Hocini","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michel","family":"Ha\u00efssaguerre","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. Bordeaux Bordeaux University Hospital (CHU)  Pessac\u2010Bordeaux France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pierre","family":"Ja\u00efs","sequence":"additional","affiliation":[{"name":"Department of Cardiac Pacing and Electrophysiology Univ. 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