Table 2. Estimated detection rates for daily snapshot monitoring in patients with stroke risk factors.
| Monitoring window of simulated daily snapshots | Number of patients with CIED data in window | Number of AT/AF patients detected by CIED in window (%) | Number of AT/AF patients detected by snapshot monitoring | |
|---|---|---|---|---|
| % of total patients | % of patients with AT/AF in window | |||
| Primary analysis (n = 370) | ||||
| 14 days | 370 | 92 (24.9 [20.5–29.6]%) | 37/370 (10.0 [7.1–13.5]%) | 37/92 (40.2 [30.1–51.0]%) |
| 28 days | 366 | 122 (33.3 [28.5–38.4]%) | 54/366 (14.8 [11.3–18.8]%) | 54/122 (44.3 [35.3–53.5]%) |
| 56 days | 359 | 166 (46.2 [41.0–51.5]%) | 77/359 (21.4 [17.3–26.1]%) | 77/166 (46.4 [38.6–54.3]%) |
| 112 days | 351 | 229 (65.2 [60.0–70.2]%) | 99/351 (28.2 [23.6–33.2]%) | 99/229 (43.2 [36.7–49.9]%) |
| 365 days | 254 | 254 (100.0%) | 126/254 (49.6 [43.3–55.9]%) | 126/254 (49.6 [43.3–55.9]%) |
| Secondary analysis (n = 526) | ||||
| 14 days | 526 | 146 (27.8 [24.0–31.8]%) | 77/526 (14.6 [11.7–18.0]%) | 77/146 (52.7 [44.3–61.1]%) |
| 28 days | 521 | 189 (36.3 [32.1–40.6]%) | 104/521 (20.0 [16.6–23.7]%) | 104/189 (55.0 [47.6–62.3]%) |
| 56 days | 510 | 252 (49.4 [45.0–53.8]%) | 135/510 (26.5 [22.7–30.5]%) | 135/252 (53.6 [47.2–59.9]%) |
| 112 days | 496 | 327 (65.9 [61.6–70.1]%) | 165/496 (33.3 [29.1–37.6]%) | 165/327 (50.5 [44.9–56.0]%) |
| 365 days | 363 | 363 (100.0%) | 203/363 (55.9 [50.6–61.1]%) | 203/363 (55.9 [50.6–61.1]%) |
Primary analysis was conducted for 370 patients, excluding those who were taking warfarin or antiarrhythmic drugs at baseline; secondary analysis was conducted for 526 patients, including those who were taking warfarin or antiarrhythmic drugs at baseline. Data are expressed as means [95% confidence intervals] of estimated AT/AF detection rates with the snapshot monitoring. CIED indicates cardiac implantable electronic device; AT, atrial tachycardia; AF, atrial fibrillation.