Current ECG Aspects of Interatrial Block

Interatrial blocks like other types of block may be of first degree or partial second degree, also named transient atrial block or atrial aberrancy, and third degree or advanced. In first degree, partial interatrial block (P-IAB), the electrical impulse is conducted to the left atrium, through the B...

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Main Authors: Antoni Bayés-de-Luna, Miquel Fiol-Sala, Manuel Martínez-Sellés, Adrian Baranchuk
Format: Article
Language:English
Published: MDPI AG 2021-09-01
Series:Hearts
Subjects:
Online Access:https://www.mdpi.com/2673-3846/2/3/33
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spelling doaj-7377c0bd71c54dcf92d22518b65151e92021-09-26T00:15:26ZengMDPI AGHearts2673-38462021-09-0123341943210.3390/hearts2030033Current ECG Aspects of Interatrial BlockAntoni Bayés-de-Luna0Miquel Fiol-Sala1Manuel Martínez-Sellés2Adrian Baranchuk3Cardiovascular Research Foundation, Cardiovascular ICCC- Program, Research Institute Hospital de la Santa Creu i Sant Pau, IIB-Sant Pau, 08025 Barcelona, SpainIlles Balears Health Research Institut (IdISBa), Hospital Son Espases, 07120 Palma, SpainCardiology Department, Hospital General Universitario Gregorio Marañón, Calle Doctor Esquerdo, 46, 28007 Madrid, SpainDepartment of Cardiology, Queen’s University, Kingston, ON K7L 3N6, CanadaInteratrial blocks like other types of block may be of first degree or partial second degree, also named transient atrial block or atrial aberrancy, and third degree or advanced. In first degree, partial interatrial block (P-IAB), the electrical impulse is conducted to the left atrium, through the Bachmann’s region, but with delay. The ECG shows a P-wave ≥ 120 ms. In third-degree, advanced interatrial block (A-IAB), the electrical impulse is blocked in the upper part of the interatrial septum (Bachmann region); the breakthrough to LA has to be performed retrogradely from the AV junction zone. This explains the p ± in leads II, III and aVF. In typical cases of A-IAB, the P-wave morphology is biphasic (±) in leads II, III and aVF, because the left atrium is activated retrogradely and, therefore, the last part of the atrial activation falls in the negative hemifield of leads II, III and aVF. Recently, some atypical cases of A-IAB have been described. The presence of A-IAB is a risk factor for atrial fibrillation, stroke, dementia, and premature death.https://www.mdpi.com/2673-3846/2/3/33interatrial blockpartial interatrial blockadvanced interatrial blockatypical patterns
collection DOAJ
language English
format Article
sources DOAJ
author Antoni Bayés-de-Luna
Miquel Fiol-Sala
Manuel Martínez-Sellés
Adrian Baranchuk
spellingShingle Antoni Bayés-de-Luna
Miquel Fiol-Sala
Manuel Martínez-Sellés
Adrian Baranchuk
Current ECG Aspects of Interatrial Block
Hearts
interatrial block
partial interatrial block
advanced interatrial block
atypical patterns
author_facet Antoni Bayés-de-Luna
Miquel Fiol-Sala
Manuel Martínez-Sellés
Adrian Baranchuk
author_sort Antoni Bayés-de-Luna
title Current ECG Aspects of Interatrial Block
title_short Current ECG Aspects of Interatrial Block
title_full Current ECG Aspects of Interatrial Block
title_fullStr Current ECG Aspects of Interatrial Block
title_full_unstemmed Current ECG Aspects of Interatrial Block
title_sort current ecg aspects of interatrial block
publisher MDPI AG
series Hearts
issn 2673-3846
publishDate 2021-09-01
description Interatrial blocks like other types of block may be of first degree or partial second degree, also named transient atrial block or atrial aberrancy, and third degree or advanced. In first degree, partial interatrial block (P-IAB), the electrical impulse is conducted to the left atrium, through the Bachmann’s region, but with delay. The ECG shows a P-wave ≥ 120 ms. In third-degree, advanced interatrial block (A-IAB), the electrical impulse is blocked in the upper part of the interatrial septum (Bachmann region); the breakthrough to LA has to be performed retrogradely from the AV junction zone. This explains the p ± in leads II, III and aVF. In typical cases of A-IAB, the P-wave morphology is biphasic (±) in leads II, III and aVF, because the left atrium is activated retrogradely and, therefore, the last part of the atrial activation falls in the negative hemifield of leads II, III and aVF. Recently, some atypical cases of A-IAB have been described. The presence of A-IAB is a risk factor for atrial fibrillation, stroke, dementia, and premature death.
topic interatrial block
partial interatrial block
advanced interatrial block
atypical patterns
url https://www.mdpi.com/2673-3846/2/3/33
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