Open AccessElectro‐vectorcardiographic demonstration of rate‐independent transient left posterior fascicular block
Author(s) -
PérezRiera Andrés Ricardo,
BarbosaBarros Raimundo,
Sá Leitão Ramos Borges Maria Tereza,
DaminelloRaimundo Rodrigo,
de Abreu Luiz Carlos,
Nikus Kjell
Publication year - 2019
Publication title -
annals of noninvasive electrocardiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.494
H-Index - 48
eISSN - 1542-474X
pISSN - 1082-720X
DOI - 10.1111/anec.12600
Subject(s) - medicine , cardiology , bradycardia , heart rate , tachycardia , atrioventricular block , treadmill , block (permutation group theory) , heart block , electrocardiography , blood pressure , mathematics , geometry
Left posterior fascicular block (LPFB) is a rare intraventricular conduction disorder of rare occurrence, especially as an isolated entity. Its transient form is even rarer and maybe rate‐independent or rate‐dependent intermittent LPFB (phase 3 block, tachycardia‐dependent and phase 4 block or bradycardia‐dependent). We present a case of a young adult male whose baseline ECG/VCG showed the typical LPFB pattern. A treadmill stress test revealed rate‐independent intermittent LPFB with random occurrence. Imaging exams ruled out structural heart disease. To our knowledge, this is the first case in the literature of a rate‐independent intermittent LPFB with no underlying structural heart disease.