PMC9300450_01
PMC9300450_02
ECG changes in a 61-year-old male working in the thermoforming process. (A) 2018 ECG findings showed a normal QTc interval of 449 ms; (B) 2019 ECG findings showed an increased QTc interval to 468 ms; (C) 2020 ECG findings showed an increased QTc interval to 490 ms.. ECG: electrocardiogram.
aoem-34-e16-g001.jpg
PMC9300450_07_aoem-34-e16-g001.jpg
F1
Her ECG findings were normal until 2018, but four years later, ECG findings in 2019 showed a T-wave abnormality (Fig. 2, Table 1).
PMC9300450_03
PMC9300450_04
PMC9300450_05
PMC9300450_06
PMC9300450_07
ECG changes in a 61-year-old male working in the thermoforming process. (A) 2018 ECG findings showed a normal QTc interval of 449 ms; (B) 2019 ECG findings showed an increased QTc interval to 468 ms; (C) 2020 ECG findings showed an increased QTc interval to 490 ms.. ECG: electrocardiogram.
aoem-34-e16-g001.jpg
PMC9300450_07_aoem-34-e16-g001.jpg
F1
Her ECG findings were normal until 2018, but four years later, ECG findings in 2019 showed a T-wave abnormality (Fig. 2, Table 1).
ECG changes in a 64-year-old female working in grinding process. (A) Normal ECG findings in 2018; (B) 2019 ECG findings showing inverted T wave in V2-V3 leads.. ECG: electrocardiogram.
aoem-34-e16-g002.jpg
PMC9300450_07_aoem-34-e16-g002.jpg
F2
Her ECG findings were normal until 2018, but four years later, ECG findings in 2019 showed a T-wave abnormality (Fig. 2, Table 1).