PULSE-SMART: Pulse-Based Arrhythmia Discrimination Using a Novel Smartphone Application
Department of Medicine, Division of Cardiovascular Medicine; Department of Quantitative Health Sciences; Department of Emergency Medicine; School of Medicine; Graduate School of Biomedical Sciences; MD/PhD Program
Cardiology | Cardiovascular Diseases | Diagnosis | Health Information Technology | Medical Physiology | Translational Medical Research
BACKGROUND: Atrial fibrillation (AF) is a common and dangerous rhythm abnormality. Smartphones are increasingly used for mobile health applications by older patients at risk for AF and may be useful for AF screening.
OBJECTIVES: To test whether an enhanced smartphone app for AF detection can discriminate between sinus rhythm (SR), AF, premature atrial contractions (PACs), and premature ventricular contractions (PVCs).
METHODS: We analyzed two hundred and nineteen 2-minute pulse recordings from 121 participants with AF (n = 98), PACs (n = 15), or PVCs (n = 15) using an iPhone 4S. We obtained pulsatile time series recordings in 91 participants after successful cardioversion to sinus rhythm from preexisting AF. The PULSE-SMART app conducted pulse analysis using 3 methods (Root Mean Square of Successive RR Differences; Shannon Entropy; Poincare plot). We examined the sensitivity, specificity, and predictive accuracy of the app for AF, PAC, and PVC discrimination from sinus rhythm using the 12-lead EKG or 3-lead telemetry as the gold standard. We also administered a brief usability questionnaire to a subgroup (n = 65) of app users.
RESULTS: The smartphone-based app demonstrated excellent sensitivity (0.970), specificity (0.935), and accuracy (0.951) for real-time identification of an irregular pulse during AF. The app also showed good accuracy for PAC (0.955) and PVC discrimination (0.960). The vast majority of surveyed app users (83%) reported that it was "useful" and "not complex" to use.
CONCLUSION: A smartphone app can accurately discriminate pulse recordings during AF from sinus rhythm, PACs, and PVCs.
DOI of Published Version
J Cardiovasc Electrophysiol. 2016 Jan;27(1):51-7. doi: 10.1111/jce.12842. Epub 2015 Nov 13. Link to article on publisher's site
Journal of cardiovascular electrophysiology
McManus DD, Chong JW, Soni A, Saczynski JS, Esa N, Napolitano C, Darling CE, Boyer EW, Rosen R, Floyd KC, Chon KH. (2016). PULSE-SMART: Pulse-Based Arrhythmia Discrimination Using a Novel Smartphone Application. UMass Center for Clinical and Translational Science Supported Publications. https://doi.org/10.1111/jce.12842. Retrieved from https://escholarship.umassmed.edu/umccts_pubs/62