TABLE 1.
Characteristics of 49 Patients with 328 Confirmed Atrial Fibrillation Episodes
| Number of Patientsa | Number of Episodes ≥ 30 Secondsa | |
|---|---|---|
| Male | 33 (67%) | 253 (77%) |
| Race/ethnicity | ||
| White | 47 (96%) | 310 (95%) |
| Black | 2 (4%) | 18 (6%) |
| History of atrial fibrillation | 24 (49%) | 204 (62%) |
| Previous myocardial infarction | 28 (62%) | 205 (66%) |
| Previous stroke | 5 (10%) | 24 (7%) |
| History of congestive heart failure | 31 (63%) | 275 (84%) |
| History of revascularization | ||
| Coronary artery bypass grafting | 15 (31%) | 145 (44%) |
| Percutaneous coronary intervention | 13 (27%) | 69 (21%) |
| Comorbidities | ||
| Pulmonary disease | 13 (27%) | 66 (20%) |
| Diabetes | 13 (27%) | 112 (34%) |
| Hypertension | 27 (56%) | 197 (62%) |
| Indications for implant | ||
| Primary | 31 (63%) | 199 (61%) |
| Secondary (cardiac arrest or sustained ventricular tachycardia) | 7 (14%) | 29 (9%) |
| Syncope apparently arrhythmic | 11 (23%) | 100 (31%) |
| Structural heart disease | ||
| Ischemic | 30 (61%) | 225 (69%) |
| Non-ischemic | 10 (20%) | 35 (11%) |
| Other | 9 (18%) | 68 (21%) |
| History of sleep apnea | 7 (16%) | 92 (30%) |
| Obese (body mass index ≥ 30) | 15 (31%) | 137 (42%) |
| Medications | ||
| Angiotensin-converting enzyme inhibitors or angiotensin receptor blocker | 41 (87%) | 311 (96%) |
| Beta blocker | 43 (92%) | 313 (97%) |
| Anti-arrhythmic agents | 10 (21%) | 117 (36%) |
| Platelet aggregation inhibitors | 31 (66%) | 153 (47%) |
| Statin | 38 (81%) | 264 (82%) |
| Air conditioning use | ||
| Central | 15 (33%) | 155 (53%) |
| Window | 28 (61%) | 121 (41%) |
| None | 3 (7%) | 19 (6%) |
| Use of a humidifier | 8 (17%) | 85 (29%) |
Values are n (%).
a
Percents may not add up to 100 due to rounding. Missing values (patients, events): previous myocardial infarction, n = (4, 16); previous stroke, n = (1, 1); pulmonary disease, n = (1, 1); history of sleep apnea, n = (4, 24); medications, n = (2, 4); air conditioning use, n = (3, 33); use of a humidifier, n = (3, 33).