the 2.0 percent of the study population exposed to the highest levels of daytime and night time aircraft noise.
The researchers noted that discussions on possible expansion plans for London's airport capacity have been on and off the table for many decades, with demand for air travel expected to double in Britain to 300 million passengers per year by 2030.
"Policy decisions need to take account of potential health related concerns, including possible effects of environmental noise on cardiovascular health," they wrote.
In a second study also published in the BMJ, researchers at the Harvard School of Public Health and Boston University School of Public Health looked at data for some 6 million Americans aged 65 or over living near 89 US airports in 2009.
The research - the first to analyse a very large population across multiple airports - found that, on average, zip codes with 10 decibel (dB) higher aircraft noise had a 3.5 percent higher cardiovascular hospital admission rate.
The results showed that people exposed to the highest noise levels - more than 55 dB - had the strongest link with hospitalisations for heart disease, and the link also remained after adjustment for socioeconomic status, demographic factors, air pollution, and proximity to roads.
Conway said that because of the kind of data used, the studies could only "suggest very strongly that we should find out much more about aircraft noise and circulatory disease".