{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T10:25:36Z","timestamp":1761560736377},"reference-count":20,"publisher":"Oxford University Press (OUP)","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2000,1,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Aims<\/jats:title>\n                  <jats:p>To demonstrate a possible inter-atrial conduction delay in patients with lone paroxysmal atrial fibrillation (PAF) using \u2018unfiltered\u2019 signal-averaged P-wave ECG (PSAECG) and compare these results with those obtained with conventional filter settings.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods and Results<\/jats:title>\n                  <jats:p>Twenty one patients with lone PAF and 20 healthy volunteers (control group) were enrolled in the study. An orthogonal lead surface ECG was high-pass filtered at 0\u00b78\u2009Hz, averaged with template matching, and combined into a spatial magnitude (\u2018unfiltered\u2019 technique). Results were compared with conventionally filtered (40\u2013300\u2009Hz) PSAECG. The filtered technique revealed no differences in P-wave duration between the two groups (121\u00b112 vs 128\u00b115\u2009ms, control and PAF groups respectively, ns). Double-peaked P-wave spatial magnitudes (interpeak distance &amp;gt;30\u2009ms) were revealed in 11 of 21 PAF patients but only in two of 18 controls (P&amp;lt;0\u00b701). The nadir in the spatial magnitude was located significantly later in the PAF group (114\u00b113 vs 103\u00b19\u2009ms,P &amp;lt;0\u00b701).<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>\u2018Unfiltered\u2019 PSAECG revealed significant differences in orthogonal P-wave morphology in patients with lone PAF, indicating the possibility of an inter-atrial conduction delay, while conventional P-wave duration analysis failed to discriminate between the two groups.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1053\/eupc.1999.0072","type":"journal-article","created":{"date-parts":[[2002,9,19]],"date-time":"2002-09-19T13:54:50Z","timestamp":1032443690000},"page":"32-41","source":"Crossref","is-referenced-by-count":61,"title":["Detection of inter-atrial conduction defects with unfiltered signal-averaged P-wave ECG in patients with lone atrial fibrillation"],"prefix":"10.1093","volume":"2","author":[{"given":"P.G.","family":"Platonov","sequence":"first","affiliation":[{"name":"Research Institute of Cardiology St. Petersburg, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.","family":"Carlson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.P.","family":"Ingemansson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"Roijer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A.","family":"Hansson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L.V.","family":"Chireikin","sequence":"additional","affiliation":[{"name":"Research Institute of Cardiology St. Petersburg, Russia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.B.","family":"Olsson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2000,1,1]]},"reference":[{"key":"2020090806034931800_b1","doi-asserted-by":"crossref","first-page":"2577","DOI":"10.1111\/j.1540-8159.1997.tb06107.x","article-title":"Signal-averaged P-wave in patients with paroxysmal atrial fibrillation","volume":"20","author":"Rosenheck","year":"1997","journal-title":"Pacing Clin Electrophysiol"},{"key":"2020090806034931800_b2","doi-asserted-by":"crossref","first-page":"1636","DOI":"10.1111\/j.1540-8159.1997.tb03533.x","article-title":"Immediate and short-term reproducibility of the P-wave signal-averaged electrocardiogram","volume":"20","author":"Ehlert","year":"1997","journal-title":"Pacing Clin 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