Research Article
Diagnostic Accuracy and Usability of the ECG247 Smart Heart Sensor Compared to Conventional Holter Technology
Table 2
Diagnostic evaluation of the arrhythmia detection in parallel tests with ECG247 Smart Heart Sensor and conventional Holter technology.
| | Arrhythmia and ectopic beats, n = 150 | Diagnostic evaluation | ECG247 algorithm, 95% CI | ECG247 algorithm and physician review, 95% CI | Holter algorithm, 95% CI | Holter algorithm and physician review, 95% CI |
| | Atrial fibrillation | Sensitivity | 8/9 = 89% (52–100) | 9/9 = 100% (66–100) | 7/9 = 78% (40–97) | 8/9 = 89% (52–100) | | Specificity | 135/141 = 96% (91–98) | 141/141 = 100% (97–100) | 115/141 = 82% (74–88) | 141/141 = 100% (97–100) | | Positive predictive value | 57% (37–75) | 100% | 21% (14–31) | 100% | | Negative predictive value | 99% (96–100) | 100% | 98% (94–99) | 99% (96–100) | | Diagnostic accuracy | 95% (91–98) | 100% (98–100) | 81% (74–87) | 99% (96–100) |
| | Ventricular ectopic beats | Sensitivity | 114/122 = 93% (87–97) | 114/122 = 93% (87–97) | 114/122 = 93% (88–97) | 118/122 = 97% (92–99) | | Specificity | 8/28 = 29% (13–49) | 28/28 = 100% (88–100) | 16/28 = 57% (37–76) | 28/28 = 100% (88–100) | | Positive predictive value | 85% (82–88) | 100% | 90% (86–94) | 100% | | Negative predictive value | 50% (29–71) | 78% (64–87) | 67% (49–81) | 88% (73–95) | | Diagnostic accuracy | 81% (74–87) | 95% (90–98) | 87% (80–92) | 97% (93–99) |
| | Supraventricular ectopic beats | Sensitivity | 130/135 = 96% (92–99) | 130/135 = 96% (92–99) | 131/135 = 97% (93–99) | 131/135 = 97% (93–99) | | Specificity | 7/15 = 47% (21–73) | 15/15 = 100% (78–100) | 9/15 = 60% (32–84) | 15/15 = 100% (78–100) | | Positive predictive value | 94% (91–96) | 100% | 96% (92–98) | 100% | | Negative predictive value | 58% (34–79) | 75% (56–88) | 69% (44–87) | 79% (59–91) | | Diagnostic accuracy | 91% (86–95) | 97% (92–99) | 93% (88–97) | 97% (93–99) |
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