Table 3.
Analysis of alert transmission durations by alert event
| Alert event | # Events | Median receipt | Mean receipt | SD receipt | P value† |
|---|---|---|---|---|---|
| AT/AF Burden | 99,987 | 6 | 12.6 | 25.1 | .2245 |
| Delivery of N Shocks | 35,519 | 6 | 9.7 | 10.5 | .2329 |
| Fast V Response | 25,391 | 6 | 13.7 | 30.2 | .0791 |
| Out of Range Subthreshold Lead Impedance | 23,793 | 6 | 15.3 | 33.3 | .0075 |
| Low Battery Voltage | 17,108 | 5.1 | 8.1 | 10.5 | .7317 |
| High RV Pacing % | 16,049 | 5.9 | 14.5 | 36.1 | .7528 |
| Monitored VT | 11,986 | 6 | 16.1 | 38.5 | .5954 |
| RV Lead Integrity | 6231 | 6 | 9 | 8.7 | .4557 |
| Fluid Detection | 4673 | 11.5 | 32.7 | 62.2 | <.0001 |
| Failed Alert Transmission | 3118 | 148 | 160.3 | 102 | <.0001 |
| RV Capture Management High Threshold | 2580 | 6.1 | 14 | 31.6 | .6071 |
| VF Detect or VF FVT via VF Rx Off | 2098 | 8.9 | 32.1 | 60.2 | <.0001 |
| Atrial Capture Management High Threshold | 1215 | 6 | 16.1 | 41.1 | .6289 |
| Exhaustion of Therapy Set | 1084 | 6 | 10.3 | 12.8 | .1866 |
| Device Circuit Error | 811 | 6.1 | 16.6 | 41.9 | .4849 |
| Lead Noise | 625 | 6.1 | 9.6 | 13 | .3362 |
| LV Capture Management High Threshold | 396 | 5.9 | 13.4 | 35 | .4326 |
| Excessive Charge Time | 107 | 7.8 | 10.3 | 9.6 | .4388 |
| Asynchronous Pacing Mode Since Midnight | 93 | 5.9 | 10.4 | 12.7 | .3782 |
| Charge Circuit Timeout | 45 | 5.7 | 8.1 | 4.9 | .9940 |
| Active Can Off and No SVC | 1 | 5 | 5 | . | .9428 |
AT/AF = atrial tachycardia/fibrillation; EOS = end of service; FVT = fast ventricular tachycardia; LV = left ventricle; RV = right ventricle; Rx = therapy; SVC = superior vena cava; VF = ventricular fibrillation; VT = ventricular tachycardia.
†
Determined by comparing individual means to the overall mean in a linear effects model (see Supplemental Table 3 for full results.)