Detecting atrial fibrillation and normal sinus rhythm by R-R intervals
Lu, H.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 27(1): 183-187
2010
ISSN/ISBN: 1001-5515 PMID: 20337050 Document Number: 642705
This paper aims to find a new method of detecting atrial fibrillation (AF) with fast responding speed and high detecting precision by R-R intervals. Probability density function (PDF) of distance between two points in the reconstructed phase space of R-R intervals of normal sinus rhythm (NSR) and AF is studied. It is found that the distribution of PDF between NSR and AF R-R intervals is significantly different; and based on this finding, a characteristic parameter k is defined. k is used for defection among 400 NSR and 400 AF R-R intervals. The results demonstrate that the new algorithm has fast responding speed and high detecting precision (average sensitivity 97.0%, average specificity 95.2%).