The Influence of Environmental Air Pollution on Ventricular Arrhythmias: A Scoping Review

Introduction: Exposure to air pollution is a recognised risk factor for cardiovascular disease and has been associated with supraventricular arrhythmias. The effect of air pollution on ventricular arrhythmias is less clear. This scoping review assessed the effects of particulate and gaseous air pollutants on the incidence of ventricular arrhythmias. Methods: MEDLINE and EMBASE databases were searched for studies assessing the effects of air pollutants on ventricular tachycardia and ventricular fibrillation. These pollutants were particulate matter (PM) 2.5, PM10, Nitrogen Dioxide (NO2), Carbon Monoxide (CO), Sulphur Dioxide (SO2), and Ozone (O3). Results: This review identified 27 studies: nine in individuals with implantable cardioverter defib-rillators, five in those with ischaemic heart disease, and 13 in the general population. Those with ischaemic heart disease appear to have the strongest association with ventricular arrhythmias in both gaseous and particulate pollution, with all three studies assessing the effects of PM2.5 demon-strating some association with ventricular arrythmia. Results in the general and ICD population were less consistent. Conclusion: Individuals with ischaemic heart disease may be at an increased risk of ventricular ar-rhythmias following exposure to air pollution.