Patients of heart and lung disease when exposed to high level of traffic allied pollution then their heart rate variability (HRV) can reduce that is a jeopardy factor for unexpected cardiac death, found a new study. HRV is a physiological happening in which the time interval between heart beats varies. It is considered by variation in the beat to beat interval.
Customized heart rate variability can escort to various factors such as depression, congestive heart failure, post cardiac transplant and deprived endurance in premature infants. A sheer fall in HRV is associated with destabilized control of the heart by the autonomic nervous system.
In a study analysis researchers from The Harvard School of Public Health examined the connection between exposure to traffic pollution and risk of sudden cardiac death on thirty residents of Atlanta area. All of them were suffering from lung disease or heart disease. Moreover the patients were spread out over a large area with conflicting population densities and distances from major roads.
The results of study found no major link between reduced HRV and level of traffic allied pollution around the place where participants lives. But a connection between both factors was obviously observable in participants who wore twenty-four hour screening device. The association was greater in case of high levels of contaminants like rudimentary carbon and nitrogen dioxide.
The conclusions of the study add to the current proof of a connection between short term revelation to traffic and condensed HRV. Further research is needed to explain why some people face an increased risk of heart attack in the hour right away after being wedged in traffic.
HRV investigations were based on gauging alteration in heart beats which is variability in intervals between R waves.