Electro‐vectorcardiographic demonstration of rate‐independent transient left posterior fascicular block | Zendy

PérezRiera Andrés Ricardo | Zendy; BarbosaBarros Raimundo | Zendy; Sá Leitão Ramos Borges Maria Tereza | Zendy; DaminelloRaimundo Rodrigo | Zendy; de Abreu Luiz Carlos | Zendy; Nikus Kjell | Zendy

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Electro‐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 , transient (computer programming) , vectorcardiography , block (permutation group theory) , electrocardiography , combinatorics , mathematics , computer science , operating system

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.

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