CONCORDANCE OF ECG WAVEFORM BETWEEN TEXTILE CHEST BAND AND STANDARD GEL 12-LEAD

BackgroundConductive yarns allow collection of biosignals such as ECG with electrodes knitted in comfortable wearable garments. These form factors however have ad-hoc ECG leads not commonly used by health professionals.Objective:To investigate concordance between the ECG waveforms collected with textile and gel electrodes, and identify which of the standard 12 leads correlates most with ECG from a chest band device.MethodsA 30 sec segment of clean signal was selected from the ECG recorded in 16 participants (12 males, 63±14 years, 198±42 lb) from a textile chest band (Skiin, Myant Inc) and an ECG machine (PC-ECG 1200HR, Norav Medical). After filtering and verifying temporal alignment, R-peaks were detected for each ECG lead and used to crop a 600ms template for each beat. Each template was normalized proportionally to its absolute maximal amplitude to allow quantitative waveform comparison. A median template was obtained by calculating sample by sample the median value of the beat samples temporarily aligned on their R-peaks. For each of the 3 median templates from the textile chest band, a concordance correlation coefficient (CCC) was calculated with each of the 12 leads of the standard system (36 CCC per participant).ResultsThe ECG pairs with highest CCC values are detailled in Table 1 and illustrated in Figure 1. Textile channel 1 concorded most with lead-V6 [.90;.99;1] (min;median;max). Textile channel 2 concorded most with lead-V4 [.79;.96;.99]. Textile channel 3 concorded most with lead-V5 [.73;.98;1]. Amongst the 48 CCC for these 3 best pairs, the only 2 CCC below 0.85 happened for 2 participants with arrhythmia in the selected 30 seconds.ConclusionCross Correlation Coefficients for the three pairs of ECG matching most between textile channels and standard gelParticipantChannel 1 and Lead V6Channel 2 and Lead V4Channel 3 and Lead V5P10.9930.9560.975P20.9740.9730.967P30.8980.9900.976P40.9910.9520.726P50.9960.8670.924P60.9720.9740.995P70.9840.9920.996P80.9880.9570.989P90.9710.9710.985P100.9860.9770.970P110.9950.9810.980P120.9480.7890.943P130.9920.9090.993P140.9900.8550.960P150.9870.9250.921P160.9750.8880.991 Open table in a new tab BackgroundConductive yarns allow collection of biosignals such as ECG with electrodes knitted in comfortable wearable garments. These form factors however have ad-hoc ECG leads not commonly used by health professionals.Objective:To investigate concordance between the ECG waveforms collected with textile and gel electrodes, and identify which of the standard 12 leads correlates most with ECG from a chest band device. Conductive yarns allow collection of biosignals such as ECG with electrodes knitted in comfortable wearable garments. These form factors however have ad-hoc ECG leads not commonly used by health professionals. Objective:To investigate concordance between the ECG waveforms collected with textile and gel electrodes, and identify which of the standard 12 leads correlates most with ECG from a chest band device. MethodsA 30 sec segment of clean signal was selected from the ECG recorded in 16 participants (12 males, 63±14 years, 198±42 lb) from a textile chest band (Skiin, Myant Inc) and an ECG machine (PC-ECG 1200HR, Norav Medical). After filtering and verifying temporal alignment, R-peaks were detected for each ECG lead and used to crop a 600ms template for each beat. Each template was normalized proportionally to its absolute maximal amplitude to allow quantitative waveform comparison. A median template was obtained by calculating sample by sample the median value of the beat samples temporarily aligned on their R-peaks. For each of the 3 median templates from the textile chest band, a concordance correlation coefficient (CCC) was calculated with each of the 12 leads of the standard system (36 CCC per participant). A 30 sec segment of clean signal was selected from the ECG recorded in 16 participants (12 males, 63±14 years, 198±42 lb) from a textile chest band (Skiin, Myant Inc) and an ECG machine (PC-ECG 1200HR, Norav Medical). After filtering and verifying temporal alignment, R-peaks were detected for each ECG lead and used to crop a 600ms template for each beat. Each template was normalized proportionally to its absolute maximal amplitude to allow quantitative waveform comparison. A median template was obtained by calculating sample by sample the median value of the beat samples temporarily aligned on their R-peaks. For each of the 3 median templates from the textile chest band, a concordance correlation coefficient (CCC) was calculated with each of the 12 leads of the standard system (36 CCC per participant). ResultsThe ECG pairs with highest CCC values are detailled in Table 1 and illustrated in Figure 1. Textile channel 1 concorded most with lead-V6 [.90;.99;1] (min;median;max). Textile channel 2 concorded most with lead-V4 [.79;.96;.99]. Textile channel 3 concorded most with lead-V5 [.73;.98;1]. Amongst the 48 CCC for these 3 best pairs, the only 2 CCC below 0.85 happened for 2 participants with arrhythmia in the selected 30 seconds. The ECG pairs with highest CCC values are detailled in Table 1 and illustrated in Figure 1. Textile channel 1 concorded most with lead-V6 [.90;.99;1] (min;median;max). Textile channel 2 concorded most with lead-V4 [.79;.96;.99]. Textile channel 3 concorded most with lead-V5 [.73;.98;1]. Amongst the 48 CCC for these 3 best pairs, the only 2 CCC below 0.85 happened for 2 participants with arrhythmia in the selected 30 seconds. ConclusionCross Correlation Coefficients for the three pairs of ECG matching most between textile channels and standard gelParticipantChannel 1 and Lead V6Channel 2 and Lead V4Channel 3 and Lead V5P10.9930.9560.975P20.9740.9730.967P30.8980.9900.976P40.9910.9520.726P50.9960.8670.924P60.9720.9740.995P70.9840.9920.996P80.9880.9570.989P90.9710.9710.985P100.9860.9770.970P110.9950.9810.980P120.9480.7890.943P130.9920.9090.993P140.9900.8550.960P150.9870.9250.921P160.9750.8880.991 Open table in a new tab