{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T15:32:59Z","timestamp":1790091179962,"version":"4.0.1"},"reference-count":37,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2018,12,13]],"date-time":"2018-12-13T00:00:00Z","timestamp":1544659200000},"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":["Clinical Cardiology"],"published-print":{"date-parts":[[2019,1]]},"abstract":"<jats:p>The existence of a tetrafascicular intraventricular conduction system remains debatable. A consensus statement ended up with some discrepancies and, despite agreeing on the possible existence of an anatomical left septal fascicle, the electrocardiographic and vectorcardiographic characteristics of left septal fascicular block (LSFB) were not universally accepted. The most important criteria requested to confirm the existence of LSFB is its intermittent nature. So far, our group has published cases of transient ischemia\u2010induced LSFB and phase 4 or bradycardia\u2010dependent LSFB. Finally, anatomical, anatomopathological, histological, histopathological, electrocardiographic, vectorcardiographic, body surface potential mapping, and electrophysiology studies support the fact that the left bundle branch divides into three fascicles or a \u201cfan\u2010like interconnected network.\u201d<\/jats:p>","DOI":"10.1002\/clc.23093","type":"journal-article","created":{"date-parts":[[2018,10,8]],"date-time":"2018-10-08T06:54:54Z","timestamp":1538981694000},"page":"169-174","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["The tetrafascicular nature of the intraventricular conduction system"],"prefix":"10.1002","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4948-538X","authenticated-orcid":false,"given":"Andr\u00e9s R.","family":"P\u00e9rez\u2010Riera","sequence":"first","affiliation":[{"name":"Design of Studies and Scientific Writing Laboratory ABC Faculty of Medicine  S\u00e3o Paulo 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