Theory of the P wave detection

Theory of the P wave detection The algorithm first finds the the possible positive and negative wave peaks based on zero transition searching, then validates them with comparing to reference P waves. The P wave detection needs high amplitude resolution. This value is better, than 0.6 uV / bit in the Cardiospy system. With this resolution and the effective filter system which uses wavelet transformation, the Cardiospy system is able to detect P waves less than 50 uV of amplitude. Validation of the P wave detector The validation is carried out on 10 pcs 12 channel and 10 pcs 3 channel ECG reference records. The reference records include the P wave annotation. 12 of the 20 records are taken from the MitBih database, 8 records are taken from the Labtech database (30000 – 30007). 12 ch records s0014lre, s0292lre, s0302lre, s0331lre, s0364lre, s0422_re, s0431_re, s0437_re, s0549_re, s0550_re 3 ch records mgh001, mgh007, 30000, 30001, 30002, 30003, 30004, 30005, 30006, 30007 Validation result: Sensitivity: 95.42% Positive predictivity: 97.16%