Indications for Undergoing 12L-ECG (n = 214)
| Indication | No. (%) |
|---|---|
| Symptom-driven ECG (n = 108) | |
| Palpitations | 48 (44.4) |
| Other chest symptoms (nonacute) | 47 (43.5) |
| Dyspnea | 23 (21.3) |
| Lightheadedness | 16 (14.8) |
| Fatigue | 14 (13.0) |
| Collapse | 3 (2.8) |
| Other | 17 (15.7) |
| Protocol-driven ECG (n = 106) | |
| Cardiovascular risk management | 34 (32.1) |
| Known diabetes mellitus | 45 (42.5) |
| Known ischemic heart disease | 13 (12.3) |
| Known heart rhythm disorder | 7 (6.6) |
| Known TIA or ischemic stroke | 4 (3.8) |
| Known heart failure | 1 (0.9) |
| Irregular pulse at examination | 1 (0.9) |
| Follow-up after starting new medication | 1 (0.9) |
12L = 12-lead; ECG = electrocardiography; TIA = transient ischemic attack.
Note: We included patients once and reported 1 reason for ECG per patient. See Supplemental Appendix, http://www.AnnFamMed.org/content/17/5/403/suppl/DC1/, for how we handled patients with >1 symptom and/or comorbidity.