Transient left septal and anterior fascicular block associated with type 1 electrocardiographic Brugada pattern
Andrés Ricardo Pérez-Riera1, Raimundo Barbosa-Barros2, Marianne Penachini da Costa de Rezende Barbosa1
1Design of Studies and Scientific Writing Laboratory in the Faculdade de Medicina do ABC, Santo André, São Paulo, Brazil.
Insights
Left septal fascicular block (LSFB), often from left anterior descending artery obstruction, may transiently associate with left anterior fascicular block and Brugada pattern. This combined presentation is novel in medical literature.
Area of Science:
- Cardiology
- Electrophysiology
- Medical Science
Background:
- Left septal fascicular block (LSFB) is a conduction abnormality affecting the left bundle branch.
- LSFB is often linked to proximal left anterior descending artery (LAD) obstruction in developed nations.
- The electrocardiographic Type 1 Brugada pattern (BrP) is associated with cardiac arrhythmias.
Abstract:
The left septal fascicular block (LSFB) or blockage of the middle fibers of the left bundle branch is probably caused mainly by - in the developed world - the proximal obstruction of the left anterior descending artery (LAD) before its first anterior septal perforator branch (S1). The association of transient LSFB and left anterior fascicular block (LAFB) - left bifascicular block - and the electrocardiographic type 1 Brugada pattern (BrP) has not been described in the literature yet.
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