The DOI matches its Crossref record.
Interobserver variability in coronary angiography.
Open accessAbstract
Four experienced coronary angiographers (two radiologists and two cardiologists) independently assessed the location and degree of coronary artery stenosis, and the location and degree of left ventricular wall motion abnormalities in 20 coronary angiograms. Marked interobserver variability was noted in quantifying percent coronary artery stenosis and degree of left ventricular wall motion abnormalities. For example, in only 13/20 (65%) of the coronary angiograms did all observers agree about the significance of a stenosis (defined as greater than 50% in diameter luminal narrowing) in the proximal or mid left anterior descending coronary artery. In 3/20 (15%) angiograms there was disagreement by at least one observer about the significance of lesions noted in the main left coronary artery. The ventricle was divided into five segments and the degree of wall motion abnormality graded into six categories of increasing severity from normal to dyskinesis. There was a 42% mean disagreement among all four observers where a disagreement between observers was defined as any difference in grading wall motion abnormalities. Interobserver variability reveals a significant limitation of coronary angiography.
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
Scanlon, P. J., Faxon, D. P., Audet, A.-M., Carabello, B., Dehmer, G. J., Eagle, K. A., Legako, R. D., Leon, D. F., Murray, J. A., Nissen, S. E., et al. (1999) · Journal of the American College of Cardiology · doi:10.1016/s0735-1097(99)00126-6 · Cited by 1,123
Reiber, J. H., Serruys, P. W., Kooijman, C. J., Wijns, W., Slager, C. J., Gerbrands, J. J., Schuurbiers, J. C., den Boer, A., & Hugenholtz, P. G. (1985) · Circulation · doi:10.1161/01.cir.71.2.280 · Cited by 829
Sicari, R., Nihoyannopoulos, P., Evangelista, A., Kasprzak, J., Lancellotti, P., Poldermans, D., Voigt, J.-U., Zamorano, J. L., & on behalf of the European Association of Echocardiography (2008) · European Journal of Echocardiography · doi:10.1093/ejechocard/jen175 · Cited by 717
Detrano, R., Janosi, A., Steinbrunn, W., Pfisterer, M., Schmid, J.-J., Sandhu, S., Guppy, K. H., Lee, S., & Froelicher, V. (1989) · The American Journal of Cardiology · doi:10.1016/0002-9149(89)90524-9 · Cited by 695
ARNETT, E. N., ISNER, J. M., REDWOOD, D. R., KENT, K. M., BAKER, W. P., ACKERSTEIN, H., & ROBERTS, W. C. (1979) · Annals of Internal Medicine · doi:10.7326/0003-4819-91-3-350 · Cited by 628
Metadata
- Authors
- Zir, L. M., Miller, S. W., Dinsmore, R. E., Gilbert, J. P., & Harthorne, J. W.
- Venue
- Circulation
- Published
- 1976-04
- Volume
- 53
- Issue
- 4
- Pages
- 627-632
- ISSN
- 0009-7322 (ISSN-L)
- 1524-4539
- OpenAlex
- W2024866658
- Cited by
- 768
- References
- 0
- FWCI
- 16.18
- 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: Interobserver variability in coronary angiography. https://app.cochat.ai/papers/10.1161/01.cir.53.4.627
- The paper
- Zir, L. M., Miller, S. W., Dinsmore, R. E., Gilbert, J. P., & Harthorne, J. W. (1976). Interobserver variability in coronary angiography. Circulation. https://doi.org/10.1161/01.cir.53.4.627
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.
