Journal: Journal of Arrhythmia
Article Title: Significance and Usefulness of High‐Resolution 24‐h Electrocardiographic Parameters in Patients With Coronavirus Disease 2019 After Admission: A Prospective Cohort Study
doi: 10.1002/joa3.70399
Figure Lengend Snippet: (A) TWA results using the high‐resolution Holter electrocardiogram in Case 1. TWA: 35.7 μV, noise level: 12.3 mV. When the noise level is between 10 mV and 20 mV, the cutoff value is 23.6 μV, and when the alternans duration is 1 min or more and the TWA is equal to or greater than the cutoff value, TWA is positive. The patient's TWA was positive. TWA, T‐wave alternans. (B) LP results using the high‐resolution Holter electrocardiogram in Case 1. c‐fQRSd (corrected filtered QRS duration): 160 ms (reference value: > 105 ms), RMS40 (root‐mean‐square voltage of the signals in the last 40 ms): 10.4 μV (reference value: < 15 μV), LAS40 (duration of the low‐amplitude signal after the voltage decreased to less than 40 μV): 57 ms (reference value: > 39 ms). The LP of the patient was positive. LP, late potential. (C) HRT results using the high‐resolution Holter electrocardiogram in Case 1. TO (turbulence onset): 0.01 (abnormal value: ≥ 0%), TS (turbulence slope): 1.00 (abnormal value: ≤ 2.5 ms per RR interval). The patient's HRT was Category 2 and was determined to be positive. HRT, heart rate turbulence.
Article Snippet: Analyses were performed using a dedicated Holter ECG analysis system SCM‐8000 (Fukuda Denshi Co., Tokyo, Japan).
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