The Incomplete Left Bundle Branch Block

Wasserburger, Richard H.; White, Douglas; Lindsay, Erin

doi:10.1378/chest.43.6.594

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…The data regarding prognosis of incomplete bundle branch blocks in general population are scarce. ILBBB is thought to result from slowing of conduction in the left bundle branch, and an association with CHD and hypertensive heart disease was found in a study from the 1960s (Wassenburger, White, & Lindsay, 1963). In the present study, iLBBB was associated with previous MI and was related to mortality only in unadjusted Cox regression analysis.…”

Section: Discussionmentioning

confidence: 99%

Long‐term outcome of intraventricular conduction delays in the general population

Rankinen

Haataja

Lyytikäinen

et al. 2020

Noninvasive Electrocardiol

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Background Previous population studies have presented conflicting results regarding the prognostic impact of intraventricular conduction delays (IVCD). Methods We studied long‐term prognostic impact and the association with comorbidities of eight IVCDs in a random sample of 6,299 Finnish subjects (2,857 men and 3,442 women, mean age 52.8, SD 14.9 years) aged 30 or over who participated in the health examination including 12‐lead ECG. For left bundle branch block (LBBB) and non‐specific IVCD (NSIVCD), two different definitions were used. Results During 16.5 years’ follow‐up, 1,309 of the 6,299 subjects (20.8%) died and of these 655 (10.4%) were cardiovascular (CV) deaths. After controlling for known clinical risk factors, the hazard ratio for CV death, compared with individuals without IVCD, was 1.55 for the Minnesota definition of LBBB (95% confidence interval 1.04–2.31, p = .032) and 1.27 (95% confidence interval 0.80–2.02, p = .308) for the Strauss’ definition of LBBB. Subjects with NSIVCD were associated with twofold to threefold increase in CV mortality depending on the definition. While right bundle branch block, left anterior fascicular block and incomplete bundle branch blocks were associated with seemingly higher mortality, this was no longer the case after adjustment for age and sex. The presence of R‐R’ pattern was not associated with any adverse outcome. Conclusions In a population study with long‐term follow‐up, NSIVCD and Minnesota definition of LBBB were independently associated with CV mortality. Other IVCDs had no significant impact on prognosis. The prognostic impact of LBBB and NSIVCD was affected by the definition of the conduction disorder.

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Section: Discussionmentioning

confidence: 99%

Long‐term outcome of intraventricular conduction delays in the general population

Rankinen

Haataja

Lyytikäinen

et al. 2020

Noninvasive Electrocardiol

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Incomplete left bundle branch block as an artefact caused by the Nuss procedure for pectus excavatum

2010

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We describe the common finding of a reversible incomplete ILBBB after Nuss surgery. The reason for these ECG changes remain unclear. Since cardiac ischaemia, damage, or perioperative irritation of the pericardium is improbable and the alteration of the anatomic thoracic situation remains after bar explantation, we suspect an artefact through alteration of the electric field by the steel bar. Practitioners dealing with patients after Nuss procedure should be aware of this most probably harmless finding.

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The Incomplete Left Bundle Branch Block

Cited by 2 publications

References 13 publications

Long‐term outcome of intraventricular conduction delays in the general population

Long‐term outcome of intraventricular conduction delays in the general population

Incomplete left bundle branch block as an artefact caused by the Nuss procedure for pectus excavatum

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