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Signal-Averaged P Wave Analysis in Patients with Paroxysmal Atrial Fibrillation  

김인영 (한양대학교 의과대학 의공학교실)
이종연 (한양대학교 의과대학 의공학교실)
이병채 (용인송담대학 의료정보시스템과)
이용희 (한라대학교 정보통신공학부)
이종민 (한양대학교 의과대학 의공학교실)
김선일 (한양대학교 의과대학 의공학교실)
김준수 (성균관의과대학 내과학교실 삼성서울병원)
Publication Information
Journal of Biomedical Engineering Research / v.23, no.1, 2002 , pp. 1-8 More about this Journal
Abstract
Atrial fibrillation(AF). chronic or paroxysmal is the most frequent arrhythmia in human subjects Duration of P wave in signal-averaged electrocardiography(SAECG) reflects intra-atrial conduction time and therefore. could be used as an electrophysiological marker for atrial conduction chance at the earthy stave. So we apply the analysis method using SAECG to diagnose Paroxysmal atrial fibrillation(PAF) . Subjects Participated for the study consisted of two groups: a control group(n=34) of normal healthy volunteers and a group of AF Patients(n=38) with a documented history of PAF but no other history of cardiac disease. We evaluated the effect of several filtering and determination methods to find the starting and ending feints of the P wavy on its duration. To increase the measurement reliability of P wave duration. the automatic detection method was proposed. Also. to increase the detection rate for PAF risk, the decision threshold value was optimized using receiver operation characteristics(ROC) curve. Results showed that the highest statistical difference (p〈0.001) of the P wane duration between controls and subjects was obtained at the Processing condition, using absolute threshold vague(8.75 $\mu N$) , a least mean square(LMS) high pass filter and 30 Hz cutoff frequency. The most outstanding difference(sensitivity 88 % specificity 64.4 %) between controls and subjects was obtained at the decision threshold value of 112 ms.
Keywords
Paroxysmal atrial fibrillation; Signal-averaged electrocardiography; P wave;
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