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The RITHMI study: diagnostic ability of a heart rhythm monitor for automatic detection of atrial fibrillation
Early detection of atrial fibrillation (AF) is a priority to reduce embolic events by initiating oral anticoagulation therapy. The aim of this study was to evaluate the diagnostic ability of a wrist device designed for automatic AF detection. RITHMI is a prospective, comparative, observational study...
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Published in: | Revista española de cardiología (English ed.) 2021-07, Vol.74 (7), p.602-607 |
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Main Authors: | , , , , , , , |
Format: | Article |
Language: | English |
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Online Access: | Get full text |
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Summary: | Early detection of atrial fibrillation (AF) is a priority to reduce embolic events by initiating oral anticoagulation therapy. The aim of this study was to evaluate the diagnostic ability of a wrist device designed for automatic AF detection.
RITHMI is a prospective, comparative, observational study that included 167 patients referred to a cardiology outpatient clinic for a general consultation or for electrical cardioversion. The study evaluated the ability of a wrist monitor that uses a photoplethysmography (PPG) signal and an electrocardiographic lead to automatically detect AF compared with diagnosis established by 2 cardiologists using the 12-lead electrocardiogram.
The AF detection algorithm based on the PPG signal had a sensitivity of 91% and a specificity of 96% (diagnostic accuracy: 93%). The automatic algorithm based on the electrocardiographic signal had a sensitivity of 94% and a specificity of 96% (diagnostic accuracy: 95%). The 2 algorithms concurred in the diagnosis in 96% of the cases. Overall, the monitor had a sensitivity and specificity of 95% (diagnostic accuracy: 95% and Kappa index: 0.98).
This study shows that automatic AF detection through the use of a heart rhythm monitor incorporating sensors and algorithms that analyze the PPG signal and the electrocardiographic signal corresponding to lead I is feasible and has high diagnostic accuracy.
La detección precoz de la fibrilación auricular (FA) es prioritaria para reducir su riesgo embólico mediante la instauración del tratamiento anticoagulante. El objetivo de este estudio es evaluar la capacidad diagnóstica de un dispositivo de muñeca diseñado para la monitorización del ritmo cardiaco y la detección automática de la FA.
El RITHMI es un estudio prospectivo, comparativo y observacional, realizado en 167 pacientes remitidos a una consulta cardiológica o para cardioversión eléctrica, en el que se comparó la capacidad de detección automática de FA de un monitor de pulsera que emplea la señal de fotopletismografía (PPG) frente a una derivación electrocardiográfica con el diagnóstico realizado por 2 cardiólogos con un ECG de 12 derivaciones.
El algoritmo de detección de FA basado en la señal de PPG mostró una sensibilidad del 91% y una especificidad del 96% (exactitud diagnóstica del 93%). El algoritmo automático basado en la señal del ECG mostró una sensibilidad del 94% y una especificidad del 96% (exactitud diagnóstica: 95%). Ambos algoritmos coincidieron en el diagnóstico en el 96% de l |
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ISSN: | 1885-5857 1885-5857 |
DOI: | 10.1016/j.rec.2020.05.034 |