Table 2.
Diagnostic performance of the handheld 6-lead ECG compared with the standard 12-lead ECG in different acquisition positions
| Supine position (113 pairs) | ||||||
|---|---|---|---|---|---|---|
| MUSE (N) |
Accuracy (95% CI) |
Sensitivity (95% CI) |
Specificity (95% CI) |
PPV (95% CI) | NPV (95% CI) | |
| Sinus rhythm | 46 | 100.0 (96.8–100.0) | 100.0 (92.3–100.0) | 100.0 (94.6–100.0) | 100.0 (92.3–100.0) | 100.0 (94.6–100.0) |
| APC | 7 | 100.0 (96.8–100.0) | 100.0 (59.0–100.0) | 100.0 (96.6–100.0) | 100.0 (59.0–100.0) | 100.0 (96.6–100.0) |
| VPC | 15 | 100.0 (96.8–100.0) | 100.0 (78.2–100.0) | 100.0 (96.3–100.0) | 100.0 (78.2–100.0) | 100.0 (96.3–100.0) |
| AF | 35 | 99.1 (95.2–100.0) | 100.0 (90.0–100.0) | 98.7 (93.1–100.0) | 97.2 (85.5–99.9) | 100.0 (95.3–100.0) |
| AFL | 10 | 99.1 (95.2–100.0) | 90.0 (55.5–99.7) | 100.0 (96.5–100.0) | 100.0 (66.4–100.0) | 99.0 (94.8–100.0) |
| Sitting position (116 pairs) | ||||||
|---|---|---|---|---|---|---|
| MUSE (N) |
Accuracy (95% CI) |
Sensitivity (95% CI) |
Specificity (95% CI) |
PPV (95% CI) | NPV (95% CI) | |
| Sinus rhythm | 47 | 100.0 (96.9–100.0) | 100.0 (92.5–100.0) | 100.0 (94.8–100.0) | 100.0 (92.5–100.0) | 100.0 (94.8–100.0) |
| APC | 5 | 100.0 (96.9–100.0) | 100.0 (47.8–100.0) | 100.0 (96.7–100.0) | 100.0 (47.8–100.0) | 100.0 (96.7–100.0) |
| VPC | 17 | 100.0 (96.9–100.0) | 100.0 (80.5–100.0) | 100.0 (96.3–100.0) | 100.0 (80.5–100.0) | 100.0 (96.3–100.0) |
| AF | 39 | 99.1 (95.3–100.0) | 100.0 (91.0–100.0) | 98.7 (93.0–100.0) | 97.5 (86.8–99.9) | 100.0 (95.3–100.0) |
| AFL | 8 | 99.1 (95.3–100.0) | 87.5 (47.3–99.7) | 100.0 (96.6–100.0) | 100.0 (59.0–100.0) | 99.1 (95–100.0) |
ECG electrocardiogram, TP true positive, FP false positive, FN false negative, CI confidence interval, PPV positive predictive value, NPV negative predictive value, APC atrial premature complex, VPC ventricular premature complex, AF atrial fibrillation, AFL atrial flutter