BIẾN THIÊN NHỊP TIM TRONG LAO ĐỘNG Ở NHÂN VIÊN Y TẾ MỘT SỐ BỆNH VIỆN TUYẾN TRUNG ƯƠNG

Abstract

This study was carried out to find out heart rate variability of health care worker during the workshift in some central hospital. 160 health care workers (49.4% male, 50.6% female) with average age $35.9\pm7.1$ and $11.7\pm6.9$ years of working time was recorded by ECG Holter MSC-8800 Holter Monitoring with Medical Systems International software (USA). During recorded time by ECG Holter, health care workers worked as usual. Analysis HRV by time-domain measurements and frequency domain measurements.

The results showed that: In health care workers, the heart rate variability index during the workingshift of time-domain was: $\ln\text{SDNN}: 3.8\pm0.41$; $\ln\text{SDNNindex}: 3.6\pm0.40$; $\ln\text{SDANNindex}: 3.2\pm0.57$; $\ln\text{-rMSSD}: 3.3\pm0.35$; $\ln\text{-pNN50}: 2.0\pm0.92$ and frequency domain was: $\text{ULF}: 0.18\pm0.24\text{ms}^2$; $\text{VLF}: 0.82\pm0.82\text{ms}^2$; $\text{LF}: 1.99\pm1.84\text{ms}^2$; $\text{HF}: 3.91\pm3.70\text{ms}^2$; $\text{LF/HF}$ ratio $0.56 \pm 0.27$.

Risk factors increase the LF/HF ratio in health care worker were: age $\ge45$ ($\text{OR}=3.7$; $95\%\text{CI}=1.3-10.2$; $p<0,01$); working time $\ge15$ years ($\text{OR}=2.5$; $95\%\text{CI}=1.3-4.9$; $p<0.01$) and worked in the emergency department, intensive care unit, poison control unit, clinical examination department, operation department ($\text{OR}=2.1$; $95\%\text{CI}=1.1-3.9$; $p<0.05$), indicating an increase in sympathetic system.