Susceptibility of COPD patients to heart rate difference associated with exposure to metals in PM2.5

Susceptibility of chronic obstructive pulmonary disease (COPD) patients to cardiovascular autonomic dysfunction associated with exposure to metals in particles with aerodynamic diameter ? 2.5 μm (PM2.5) remains poorly evidenced. Recently, based on a panel study in Beijing, China, Chinese researchers recruited both COPD patients and healthy controls and used heart rate (HR) as an index of cardiovascular autonomic function. Their findings indicate that COPD could exacerbate HR difference following exposure to metals in PM2.5.