The DOI matches its Crossref record.
Endocardial activation of left bundle branch block.
Open accessAbstract
Endocardial catheter mapping was performed in 18 patients with left bundle branch block (LBBB). Four patients had no organic heart disease (group I), six had cardiomyopathy (group II), and eight had coronary artery disease and previous infarction (group III). Twelve patients had one septal site of left ventricular endocardial breakthrough, while six had two left ventricular endocardial breakthrough sites, with one site always being septal. There was no significant difference among the groups with respect to time of left ventricular breakthrough (group I, 44 msec after the onset of the QRS complex; group II, 58 msec; and group III, 51 msec). Total left ventricular endocardial activation time was significantly longer in group III (119 msec) than group I (81 msec; p less than .05) and group II (61 msec; p less than .001). Duration of total right ventricular endocardial activation was 36 msec (seven patients). The final site of right ventricular activation was at 44 msec after the onset of the QRS complex. We conclude that (1) right ventricular activation occurs before initiation of left ventricular activation in patients with LBBB, (2) left ventricular endocardial activation in patients with LBBB most likely occurs as a result of right-to-left transseptal activation, (3) left ventricular endocardial activation sequence in patients with LBBB is heterogeneous, and (4) patients with coronary artery disease and LBBB have significantly longer total left ventricular endocardial activation times than patients with no organic heart disease or those with cardiomyopathies.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cited by
Auricchio, A., Stellbrink, C., Block, M., Sack, S., Vogt, J., Bakker, P., Klein, H., Kramer, A., Ding, J., Salo, R., et al. (1999) · Circulation · doi:10.1161/01.cir.99.23.2993 · Cited by 1,152
Auricchio, A., Fantoni, C., Regoli, F., Carbucicchio, C., Goette, A., Geller, C., Kloss, M., & Klein, H. (2004) · Circulation · doi:10.1161/01.cir.0000118502.91105.f6 · Cited by 585
Upadhyay, G. A., Cherian, T., Shatz, D. Y., Beaser, A. D., Aziz, Z., Ozcan, C., Broman, M. T., Nayak, H. M., & Tung, R. (2019) · Circulation · doi:10.1161/circulationaha.118.038648 · Cited by 350
Derval, N., Steendijk, P., Gula, L. J., Deplagne, A., Laborderie, J., Sacher, F., Knecht, S., Wright, M., Nault, I., Ploux, S., et al. (2010) · Journal of the American College of Cardiology · doi:10.1016/j.jacc.2009.08.045 · Cited by 268
Biomechanics of Cardiac Electromechanical Coupling and Mechanoelectric Feedback
Pfeiffer, E. R., Tangney, J. R., Omens, J. H., & McCulloch, A. D. (2014) · Journal of Biomechanical Engineering · doi:10.1115/1.4026221 · Cited by 131
Metadata
- Authors
- Vassallo, J. A., Cassidy, D. M., Marchlinski, F. E., Buxton, A. E., Waxman, H. L., Doherty, J. U., & Josephson, M. E.
- Venue
- Circulation
- Published
- 1984-05
- Volume
- 69
- Issue
- 5
- Pages
- 914-923
- ISSN
- 0009-7322 (ISSN-L)
- 1524-4539
- OpenAlex
- W2019196036
- Cited by
- 227
- References
- 0
- FWCI
- 3.62
- Type
- journal article
- Language
- en
- Open access
- bronze
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Endocardial activation of left bundle branch block. https://app.cochat.ai/papers/10.1161/01.cir.69.5.914
- The paper
- Vassallo, J. A., Cassidy, D. M., Marchlinski, F. E., Buxton, A. E., Waxman, H. L., Doherty, J. U., & Josephson, M. E. (1984). Endocardial activation of left bundle branch block. Circulation. https://doi.org/10.1161/01.cir.69.5.914
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
