CoChat
Sign Up
Cited by 132Cardiac pacing and defibrillation studiesCardiac electrophysiology and arrhythmiasCardiac Arrhythmias and Treatments

The DOI matches its Crossref record; 41 of the 41 references it cites were found in a registry or an index.

Survival in second degree atrioventricular block

Open access
Shaw, D B, Kekwick, C A, Veale, D, Gowers, J, Whistance, T·1985·Heart
DOI 10.1136/hrt.53.6.587PMC PMC481819
Open this paper in CoChat — free accountOpen PDF

Abstract

Two hundred and 14 patients with chronic second degree heart block were seen and followed up in the Devon Heart Block and Bradycardia Survey between 1968 and 1982. The patients were divided into three groups according to the type of block. In group 1 there were 77 patients with Mobitz type I block (mean age 69 years), in group 2, 86 patients with Mobitz type II block (mean age 74 years), and in group 3, 51 with 2:1 or 3:1 block (mean age 75 years). The five year survival was similar in all groups, being 57%, 61%, and 53% in groups 1, 2, and 3 respectively. The presence or absence of bundle branch block did not appear to influence prognosis. In particular, patients in group 1 without bundle branch block did not fare any better than those in group 2 both with and without bundle branch block. One hundred and three of the patients were fitted with pacemakers, the proportion being greatest in group 2. In each group a significantly larger number of paced patients survived than unpaced. The five year survival for all the paced patients in the study was 78% compared with 41% for the unpaced. Since the paced patients were slightly younger than the unpaced two age matched groups of 74 patients each were selected from the paced and unpaced patients, but the five year survival of those paced was still significantly better. It is concluded that in the patients in the present study chronic Mobitz type I block has a similar prognosis to that of Mobitz type II block. Unpaced patients with both types did very badly, whereas those fitted with pacemakers had a five year survival similar to that expected for the normal population. These results refute the benign reputation of chronic Mobitz type I block and imply that patients with this condition should be considered for pacemaker implantation on similar criteria to those adopted for patients with higher degrees of block.

Overview

Integrity signals

Registry

Crossref · 10.1136/hrt.53.6.587

Cites

41 of 41 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Verification

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Citations

Cites

Research works printed but not linked: 2

  1. Shaw DB, Kekwick CA. Potential candidates for pacemakers. Br HeartJ 1978; 40: 99-105.
  2. Schamroth L. The disorders of cardiac rhythm I. 2nd ed. Oxford: Blackwell, 1980: 181-4.

Cited by

Sorted by citations

See all 132

Related

See all

Metadata

Authors
Shaw, D. B., Kekwick, C. A., Veale, D., Gowers, J., & Whistance, T.
Affiliations
Royal Devon & Exeter NHS Foundation Trust (GB)
Venue
Heart
Publisher
BMJ
Published
1985-06-01
Volume
53
Issue
6
Pages
587-593
ISSN
1355-6037 (ISSN-L)
DOI
10.1136/hrt.53.6.587
PMC
PMC481819
OpenAlex
W2029244128
Cited by
132
References
41
Citations by year
2026: 2 · 2025: 2 · 2024: 3 · 2023: 1 · 2022: 5 · 2021: 6 · 2020: 3 · 2019: 6 · 2018: 6 · 2017: 7 · 2016: 1 · 2015: 3 · 2014: 4 · 2013: 4 · 2012: 9
FWCI
2.45
Type
journal article
Language
en
Open access
Locations
  • Heart (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac pacing and defibrillation studies
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Arrhythmias and Treatments
Keywords
second-degree atrioventricular block, Mobitz type II block, survival, prognosis, pacemaker implantation, bundle branch block, bradycardia
MeSH terms
Adult, Aged, Bundle-Branch Block, Cardiac Pacing, Artificial, Female, Heart Block, Heart Conduction System, Humans, Male, Middle Aged, Prospective Studies

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