Antonio Sarmento1, Carlo Vignati2, Stefania Paolillo3, Carolina Lombardi4, Alessandra Scoccia5, Flavia Nicoli5, Massimo Mapelli5, Alessandra Leonardi6, Dario Ossola6, Rudy Rigoni7, Piergiuseppe Agostoni8, Andrea Aliverti1. 1. Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milano, Italy. 2. Centro Cardiologico Monzino, IRCCS, Milano, Italy; Dept. of Clinical Sciences and Community Health, Cardiovascular Section, University of Milano, Milano, Italy. 3. IRCCS SDN, Napoli, Italy. 4. Sleep Medicine Center, S. Luca Hospital, IRCCS, Istituto Auxologico Italiano, Milan, Italy. 5. Centro Cardiologico Monzino, IRCCS, Milano, Italy. 6. L.I.F.E. Corporation S.A., Luxembourg. 7. Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milano, Italy; L.I.F.E. Corporation S.A., Luxembourg. 8. Centro Cardiologico Monzino, IRCCS, Milano, Italy; Dept. of Clinical Sciences and Community Health, Cardiovascular Section, University of Milano, Milano, Italy. Electronic address: piergiuseppe.agostoni@unimi.it.
Abstract
BACKGROUND: Recent advances in wearable technology make continuous cardiorespiratory monitoring possible, with potential applications in assessment of cardiopulmonary patients, healthy subjects and athletes. The aim of the present study was to qualitatively and quantitatively evaluate a new wearable device (Learn Inspire Free Entertain = L.I.F.E.) by embedding in a compression shirt a 12‑lead ECG system and 5 respiratory sensors. METHODS: Thirty cardiorespiratory patients and ten healthy subjects were studied for 24 h during their usual life activities. In 8 healthy subjects, simultaneous measurements of the device and of an ergo-spirometer were performed during different levels of ventilation in five different body positions. The quality of ECG signals in terms of measurability of heart rate, P wave, QRS complex and ST segment, was analyzed by four expert cardiologists/respiratory physiologists using an arbitrary 1-5 scale. The sum of the respiratory signals was used to calculate the respiratory rate, inspiratory time and relative changes of tidal volume. These parameters were compared to ergo-spirometer measurements. RESULTS: Median quality value was >3 for heart rate, QRS complex, ST segment and P wave (except in L3, aVL, aVF, V1 and V2 leads). Median quality of respiratory traces was >4 in patients and between 3 and 4 in healthy subjects. The respiratory monitoring of respiratory rate and inspiratory time was accurate in all body positions. Tidal volumes were underestimated due to a high level of ventilation. CONCLUSIONS: The L.I.F.E. device provides an accurate continuous monitoring of cardiorespiratory signals during the 24 h both in normal subjects and cardiorespiratory patients.
BACKGROUND: Recent advances in wearable technology make continuous cardiorespiratory monitoring possible, with potential applications in assessment of cardiopulmonary patients, healthy subjects and athletes. The aim of the present study was to qualitatively and quantitatively evaluate a new wearable device (Learn Inspire Free Entertain = L.I.F.E.) by embedding in a compression shirt a 12‑lead ECG system and 5 respiratory sensors. METHODS: Thirty cardiorespiratory patients and ten healthy subjects were studied for 24 h during their usual life activities. In 8 healthy subjects, simultaneous measurements of the device and of an ergo-spirometer were performed during different levels of ventilation in five different body positions. The quality of ECG signals in terms of measurability of heart rate, P wave, QRS complex and ST segment, was analyzed by four expert cardiologists/respiratory physiologists using an arbitrary 1-5 scale. The sum of the respiratory signals was used to calculate the respiratory rate, inspiratory time and relative changes of tidal volume. These parameters were compared to ergo-spirometer measurements. RESULTS: Median quality value was >3 for heart rate, QRS complex, ST segment and P wave (except in L3, aVL, aVF, V1 and V2 leads). Median quality of respiratory traces was >4 in patients and between 3 and 4 in healthy subjects. The respiratory monitoring of respiratory rate and inspiratory time was accurate in all body positions. Tidal volumes were underestimated due to a high level of ventilation. CONCLUSIONS: The L.I.F.E. device provides an accurate continuous monitoring of cardiorespiratory signals during the 24 h both in normal subjects and cardiorespiratory patients.
Authors: Jun Hua Chong; C Anwar A Chahal; Ajay Gupta; Fabrizio Ricci; Mark Westwood; Francesca Pugliese; Steffen E Petersen; Mohammed Y Khanji Journal: Front Cardiovasc Med Date: 2021-07-02