Research Article
QRS Detection Based on Improved Adaptive Threshold
Table 1
Results of evaluating threshold algorithm using MIT-BIH Arrhythmia database.
| Num | Actual | TP | FP | FN | Det_Rate |
| 100 | 2273 | 2272 | 0 | 1 | 0.99956 | 101 | 1865 | 1865 | 3 | 0 | 0.99839 | 102 | 2187 | 2187 | 0 | 0 | 1.00000 | 103 | 2084 | 2082 | 1 | 2 | 0.99856 | 104 | 2229 | 2229 | 16 | 0 | 0.99282 | 105 | 2572 | 2572 | 44 | 0 | 0.98289 | 106 | 2027 | 2021 | 1 | 6 | 0.99655 | 107 | 2137 | 2132 | 1 | 5 | 0.99719 | 108 | 1763 | 1763 | 41 | 0 | 0.97674 | 109 | 2532 | 2527 | 1 | 5 | 0.99763 | 111 | 2124 | 2122 | 1 | 2 | 0.99859 | 112 | 2539 | 2538 | 1 | 1 | 0.99921 | 113 | 1795 | 1794 | 0 | 1 | 0.99944 | 114 | 1879 | 1879 | 6 | 0 | 0.99681 | 115 | 1953 | 1952 | 1 | 1 | 0.99898 | 116 | 2412 | 2401 | 3 | 11 | 0.99420 | 117 | 1535 | 1534 | 1 | 1 | 0.99870 | 118 | 2278 | 2277 | 1 | 1 | 0.99912 | 119 | 1987 | 1986 | 2 | 1 | 0.99849 | 121 | 1863 | 1861 | 1 | 2 | 0.99839 | 122 | 2476 | 2475 | 1 | 1 | 0.99919 | 123 | 1518 | 1514 | 1 | 4 | 0.99671 | 124 | 1619 | 1618 | 1 | 1 | 0.99876 | 200 | 2601 | 2600 | 2 | 1 | 0.99885 | 201 | 1963 | 1944 | 6 | 19 | 0.98726 | 202 | 2136 | 2128 | 3 | 8 | 0.99485 | 203 | 2980 | 2964 | 14 | 16 | 0.98993 | 205 | 2656 | 2651 | 1 | 5 | 0.99774 | 207 | 2332 | 2260 | 12 | 72 | 0.96398 | 208 | 2955 | 2945 | 3 | 10 | 0.99560 | 209 | 3005 | 3005 | 1 | 0 | 0.99967 | 210 | 2650 | 2601 | 3 | 49 | 0.98038 | 212 | 2748 | 2747 | 1 | 1 | 0.99927 | 213 | 3251 | 3243 | 0 | 8 | 0.99754 | 214 | 2262 | 2260 | 1 | 2 | 0.99867 | 215 | 3363 | 3359 | 1 | 4 | 0.99851 | 217 | 2208 | 2203 | 1 | 5 | 0.99728 | 219 | 2154 | 2152 | 2 | 2 | 0.99814 | 220 | 2048 | 2047 | 1 | 1 | 0.99902 | 221 | 2427 | 2404 | 1 | 23 | 0.99011 | 222 | 2483 | 2479 | 2 | 4 | 0.99758 | 223 | 2605 | 2583 | 1 | 22 | 0.99117 | 228 | 2053 | 2053 | 10 | 0 | 0.99513 | 230 | 2256 | 2255 | 1 | 1 | 0.99911 | 231 | 1571 | 1570 | 1 | 1 | 0.99873 | 232 | 1780 | 1780 | 139 | 0 | 0.92191 | 233 | 3079 | 3071 | 1 | 8 | 0.99708 | 234 | 2753 | 2748 | 1 | 5 | 0.99782 | 48 | 109966 | 109653 | 337 | 313 | 0.99409 |
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