{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,12]],"date-time":"2026-11-12T00:26:33Z","timestamp":1794443193466,"version":"4.9.1"},"reference-count":31,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2004,4,30]],"date-time":"2004-04-30T00:00:00Z","timestamp":1083283200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cardiovasc electrophysiol"],"published-print":{"date-parts":[[2004,5]]},"abstract":"<jats:p> <jats:italic>Introduction:<\/jats:italic> The high posterolateral right atrium (RA) is considered the \u201csinus node area,\u201d but we lack information on endocardial atrial activation in sinus rhythm. We studied RA and left atrial (LA) endocardial activation in the electrophysiology laboratory.<\/jats:p><jats:p> <jats:italic>Methods and Results:<\/jats:italic> Thirty\u2010five patients (21 men) aged 47 \u00b1 16.4 years (mean \u00b1 SD) underwent RA mapping (22.2 \u00b1 3.8 points). In 21 patients, LA activation was mapped (11.1 \u00b1 3.9 points) through the coronary sinus (CS), right pulmonary artery, and\/or a patent oval foramen. Fourteen patients had atrial arrhythmias, and 3 an ECG pattern of Bachmann's bundle block. Endocardial RA activation preceded P wave in 5 (\u201314 \u00b1 4.2 ms), coincided in 11, and followed P onset in 18 (16.7 \u00b1 6.6 ms). Location of the zero point varied from the superior vena cava to the low RA and from lateral to paraseptal RA. In 19 patients, activation started simultaneously in 2 to 5 points located \u22651 cm apart. RA activation was descending in most, but in 3 with low onset there was collision in the anterior and septal walls. In 15 of 21 patients, descending LA activation dominated, ending in the mid CS in 12, proximal CS in 1, and simultaneously throughout the CS in 2. In 3 with Bachmann's bundle block, CS activation was ascending and in 2 double potentials were recorded from the LA roof.<\/jats:p><jats:p> <jats:italic>Conclusion:<\/jats:italic> During stable sinus rhythm, RA activation can start in different areas or simultaneously over large areas resulting in different activation patterns, both in the RA and the LA. LA activation is predominantly descending, but in Bachmann's bundle block it becomes ascending, and double potentials suggest a location of block in the LA roof. <jats:italic>(J Cardiovasc Electrophysiol, Vol. 15, pp. 524\u2010531, May 2004)<\/jats:italic><\/jats:p>","DOI":"10.1046\/j.1540-8167.2004.03403.x","type":"journal-article","created":{"date-parts":[[2010,8,16]],"date-time":"2010-08-16T09:32:33Z","timestamp":1281951153000},"page":"524-531","source":"Crossref","is-referenced-by-count":67,"title":["Atrial Activation Mapping in Sinus Rhythm in the Clinical Electrophysiology Laboratory:"],"prefix":"10.1111","volume":"15","author":[{"given":"FRANCISCO G.","family":"COS\u00cdO","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"ARTURO","family":"MART\u00cdN\u2010PE\u00d1ATO","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"AGUST\u00cdN","family":"PASTOR","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"AMBROSIO","family":"N\u00da\u00d1EZ","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"MAR\u00cdA ANTONIA","family":"MONTERO","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"CARINA P.","family":"CANTALE","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"SALOMAO","family":"SCHAMES","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2004,4,30]]},"reference":[{"key":"e_1_2_7_2_2","first-page":"147","article-title":"The site of origin of the mammalian heart beat: the pacemaker in the dog","volume":"2","author":"Lewis T","year":"1910","journal-title":"Heart"},{"key":"e_1_2_7_3_2","first-page":"78","article-title":"Sur le point d'origine de la systole cardiaque dans l'oreillette droite","volume":"10","author":"Wybaw R","year":"1910","journal-title":"Arch Intern Physiol"},{"key":"e_1_2_7_4_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.41.6.899"},{"key":"e_1_2_7_5_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.77.6.1221"},{"key":"e_1_2_7_6_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1540-8167.2002.00001.x"},{"key":"e_1_2_7_7_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8167.1999.tb00291.x"},{"key":"e_1_2_7_8_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8159.1996.tb03368.x"},{"key":"e_1_2_7_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(78)90862-7"},{"key":"e_1_2_7_10_2","doi-asserted-by":"publisher","DOI":"10.1136\/hrt.43.6.689"},{"key":"e_1_2_7_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0735-1097(87)80081-5"},{"key":"e_1_2_7_12_2","first-page":"1490","article-title":"Troubles de la conduction intra\u2010auriculaire par bloc du faisceau de Bachmann","volume":"64","author":"Castillo A","year":"1971","journal-title":"Arch Mal Coeur"},{"key":"e_1_2_7_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-0736(85)80029-7"},{"key":"e_1_2_7_14_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(77)90048-0"},{"key":"e_1_2_7_15_2","doi-asserted-by":"publisher","DOI":"10.1136\/hrt.73.6.559"},{"key":"e_1_2_7_16_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(77)90048-0"},{"key":"e_1_2_7_17_2","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(79)90327-8"},{"key":"e_1_2_7_18_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.97.16.1623"},{"key":"e_1_2_7_19_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1540-8167.2002.01152.x"},{"key":"e_1_2_7_20_2","doi-asserted-by":"publisher","DOI":"10.1016\/0735-1097(93)90346-3"},{"key":"e_1_2_7_21_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-8703(96)90526-8"},{"key":"e_1_2_7_22_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.62.6.1324"},{"key":"e_1_2_7_23_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.92.10.2919"},{"key":"e_1_2_7_24_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1540-8167.2001.00814.x"},{"key":"e_1_2_7_25_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1540-8167.1999.tb00211.x"},{"key":"e_1_2_7_26_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.100.17.1791"},{"key":"e_1_2_7_27_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.RES.29.5.452"},{"key":"e_1_2_7_28_2","first-page":"31","article-title":"Troubles de la conduction interauriculaire par bloc du faisceau de Bachmann. 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