Cardiovascular changes in workers exposed to fine particulate dust.

Area of Science:

• Occupational Health
• Environmental Cardiology
• Cardiovascular Physiology

Background:

• Airborne particulate matter is linked to increased cardiovascular disease incidence and mortality.
• Occupational exposure to particulate air pollution requires further investigation for its health impacts.
• Ceramic ware factory workers are exposed to dust, necessitating an assessment of their cardiovascular health.

Purpose of the Study:

• To evaluate the cardiovascular reactions in workers exposed to fine particulate dust.
• To assess the autonomic regulation in ceramic ware factory workers exposed to dust.
• To identify potential early indicators of cardiovascular effects from occupational dust exposure.

Main Methods:

• Medical examinations, including resting and 24-h ECG with heart rate variability (HRV) analysis, were performed.
• Ambulatory blood pressure monitoring (ABPM) was conducted on 20 exposed male workers and 20 controls.
• Individual dust exposure was measured using dosimeters, with fine particulate dust (FPD) concentration quantified.

Main Results:

• No significant abnormalities in resting ECG or ABPM were found between exposed and control groups.
• Exposed workers exhibited a significantly lower resting heart rate and higher STD R-R values.
• Heart rate variability analysis revealed a significantly higher high frequency (HF) component and a lower LF/HF ratio in the exposed group, suggesting parasympathetic predominance.

Conclusions:

• While no overt ECG or ABPM abnormalities were detected, changes in heart rate variability indicate neurovegetative disturbances.
• Parasympathetic predominance observed in exposed workers may serve as an early indicator of cardiovascular system effects from fine particulate dust.
• Occupational exposure to fine particulate dust warrants continued monitoring for subtle cardiovascular regulatory changes.