Author + information
- Josephine Larkin Harrington,
- Jo Woon Chong,
- Jinseok Li,
- Nada Esa,
- Rahul Pidikiti,
- Oscar Maitas,
- David McManus and
- Ki H. Chon
The detection of arrhythmias via a smartphone application would allow for timely detection and treatment of patients. This smartphone application has already been designed and used to successfully differentiate atrial fibrillation from normal sinus rhythm with an extremely high accuracy (97.6%), but has not been used to differentiate AF from other arrhythmias.
93 adults underwent rhythm assessment using a novel iPhone 4S application. Three statistical methods [Root Mean Square of Successive RR Difference (RMSDD/mean), Shannon Entropy (ShE), and Sample Entropy (SampE)] were used to detect atrial fibrillation and an algorithm utilizing successive 2D sequencing in a Poincare plot was used to identify those patients with atrial or ventricular ectopy.
This application successfully differentiated patients with AF, PAC/PVC and normal sinus rhythm. Furthermore, specific patterns in a Poincare plot were able to distinguish between bigeminy, trigeminy or quadrigeminy. Utilizing the Poincare plot to differentiate beat-to-beat characteristics and applying pattern matching algorithms, we observed that our algorithm showed a detection accuracy for PAC/PVC of 97.8%.
Our findings show that this smartphone application is able to accurately detect and classify an irregular pulse from signals in the fingertip of patients with AF and PACs/PVCs. This program could be effectively and inexpensively used to improve AF detection in the general population.
|Poincare Plot+RMSSD+ ShE||1.0000||0.8798||0.9180|
|Poincare Plot+RMSSD+ SampE||1.0000||0.8743||0.9126|
|Poincare Plot+RMSSD+ ShE+SampE||1.0000||0.9773||0.9781|
↵* Test Characteristics of PAC/PVC Detection Statistical Methods Established using the threshold values of RMSDD = 0.1300, Shannon Entropy = 0.7913, and Sample Entropy = 1.2903 Poincare Plot = 0.1. RMSSD = Root Mean Square of Successive RR Differences
Moderated Poster Contributions
Poster Sessions, Expo North
Sunday, March 10, 2013, 3:45 p.m.-4:30 p.m.
Session Title: Arrhythmias: Devices III – Use of Arrhythmia Devices in Novel Patient Populations
Abstract Category: 8. Arrhythmias: Devices
Presentation Number: 1235M-32
- 2013 American College of Cardiology Foundation