2018年9月22日土曜日
Validation of P wave detection
Validation of P wave detection
The result rate of Cardiospy algorithms is determined by testing on a reference database, thus validating the P wave detection algorithm. The reference database contains typical P wave occurrences: small and large amplitudes, mono and biphasic, narrow and wide, short and long PQ distances.
The result of the algorithm is: Se = 95.42%, Pp = 97.16%.
(Se = Sensitivity; Pp = Positive predictivity)
Validation of disease types associated with P wave detection
The Cardiospy system uses the P wave analysis to detect various AV blocks and Atrial Fibrillation. Similarly to the P wave detection, determination of the result ratio of AV blocks and Atrial Fibrillation analyses is also performed by reference to a reference database.
The reference databases consist of some of the representative records collected from MitBih (AF) database and partly by Labtech Ltd.
Result of algorithms:
Se[%] Pp[%]
AF 96.46 98.71
AV-I 100 99.58
AV-II-M1 100 95.24
AV-II-M2 78.57 80
AV-III 76.12 99.23
Displaying P waves in Bird View
In the Cardiospy software using the Bird View option, the presence or absence of P waves or changes in morphology can be easily inspected visually: