Outcomes of 12L-ECG (n = 214)
| Outcome | No. (%) |
|---|---|
| Rhythm | |
| Sinus rhythm | 187 (87.4) |
| Atrial fibrillation | 20 (9.3) |
| Atrial flutter | 3 (1.4) |
| Narrow complex tachycardia | 3 (1.4) |
| Broad complex tachycardia | 0 (0) |
| Ectopic atrial rhythm | 1 (0.5) |
| Ectopic beats | |
| Premature atrial complex | 7 (3.3) |
| Premature ventricular complex | 16 (7.5) |
| Conduction abnormalities | |
| AV block | 7 (3.3) |
| First-degree AV block | 7 (100) |
| Second-degree AV block, Wenckebach | 0 (0) |
| Second-degree AV block, Mobitz II | 0 (0) |
| Third-degree AV block | 0 (0) |
| Bundle branch block | 23 (10.7) |
| LBBB | 5 (21.7) |
| RBBB | 9 (39.1) |
| LAD/LAFB | 9 (39.1) |
| Composite outcomes | |
| Atrial fibrillation or flutter | 23 (10.7) |
| Any rhythm abnormalitya | 44 (20.6) |
| Any conduction abnormalityb | 28 (13.1) |
12L = 12-lead; AV = atrioventricular; ECG = electrocardiography; LAD = left axis deviation; LAFB = left anterior fascicular block; LBBB = left bundle branch block; RBBB = right bundle branch block.
↵a Six patients showed 2 rhythm abnormalities on 12L-ECG (see Supplemental Figure 1, http://www.AnnFamMed.org/content/17/5/403/suppl/DC1/).
↵b One patient showed 3 conduction abnormalities on 12L-ECG (see Supplemental Figure 1, http://www.AnnFamMed.org/content/17/5/403/suppl/DC1/).