| Name |
Bifascicular block (bifasc_block) |
| Category |
Cardiovascular |
| Sex |
|
| Adult |
Yes |
| UUID |
bf467e6a-9655-4ba6-9562-6a5b1b4eb80d |
| Definition |
A conduction abnormality in the heart where two of the three main fascicles of the His/Purkinje system are blocked. |
Ontologies
Key Summary Statistics
Cases from any source
| Total |
388 |
| Female (%) |
84 (22%) |
| Male (%) |
304 (78%) |
Year first recorded
Cases linked in all UK Biobank sources
Cross-source concordance
Vertical bars correspond to number of cases per source/intersection; horizontal bars to left correspond to total number of cases per source.
Incidence & prevalence
Baseline prevalence stratified by sex
| Female |
0.0 (0.0,0.0) |
| Male |
0.28 (-0.11,0.67) |
Incidence stratified by sex
| Female |
0.14 (0.04,0.24) |
| Male |
0.55 (0.34,0.76) |
Incidence stratified by age
| Ages 40-44 |
0.0 (0.0,0.0) |
| Ages 45-49 |
0.07 (-0.07,0.22) |
| Ages 50-54 |
0.06 (-0.06,0.19) |
| Ages 55-59 |
0.26 (0.03,0.49) |
| Ages 60-64 |
0.35 (0.12,0.57) |
| Ages 65-69 |
0.9 (0.49,1.32) |
Period prevalence
Methods
Comparison with general population
Sex-standardised prevalence from CALIBER study (Kuan et al. 2019)
| Population |
Ages 40-49 |
Ages 50-59 |
Ages 60-69 |
| UK Biobank |
0 (0,2) |
1 (0,2) |
3 (2,5) |
| CALIBER |
– |
– |
3 (3,4) |
Stratified by age and Townsend deprivation status
| Deprivation status |
Ages 40-49 |
Ages 50-59 |
Ages 60-69 |
| Least deprived |
0(NaN,NaN) |
1(0,5) |
3(1,7) |
| Low |
0(NaN,NaN) |
0(NaN,NaN) |
4(2,8) |
| Medium |
1(0,6) |
2(0,6) |
3(1,7) |
| High |
1(0,7) |
2(0,5) |
2(0,5) |
| Most deprived |
0(NaN,NaN) |
2(0,6) |
3(1,8) |
Stratified by age and country
| Country |
Ages 40-49 |
Ages 50-59 |
Ages 60-69 |
| England |
1(0,2) |
1(0,2) |
3(2,5) |
| Scotland |
0(NaN,NaN) |
1(0,7) |
2(0,8) |
| Wales |
0(NaN,NaN) |
2(0,12) |
3(0,10) |
Definition
| UK Biobank field id |
Description |
Code |
Value |
| 41202 |
Diagnoses - main ICD10 |
I45.2 |
Bifascicular block |
| 41204 |
Diagnoses - secondary ICD10 |
I45.2 |
Bifascicular block |
| 40001 |
Underlying (primary) cause of death: ICD10 |
I45.2 |
Bifascicular block |
| 40002 |
Contributory (secondary) causes of death: ICD10 |
I45.2 |
Bifascicular block |
| 42040 |
GP clinical event records |
329F.00 |
ECG: right bundle branch and left anterior fascicular block |
| 42040 |
GP clinical event records |
329G.00 |
ECG: right bundle branch and left posterior fascicular block |
| 42040 |
GP clinical event records |
G565100 |
Right BBB with left posterior fascicular block |
| 42040 |
GP clinical event records |
G565200 |
Right BBB with left anterior fascicular block |
| 42040 |
GP clinical event records |
XaRCM |
ECG: right bundle branch and left anterior fascicular block |
| 42040 |
GP clinical event records |
XaRCN |
ECG: right bundle branch and left posterior fascicular block |