Microplastics could be responsible for a lot of heartache. The tiny pieces of plastic have been found in high amounts in patients who suffered from heart attacks, leading experts to question their effect on cardiovascular health. Plastic likely has a more significant impact on health than we currently know and should be taken into account in analyzing environmental risk management.
Heart of plastic
Microplastics were “detected significantly more frequently” in patients who suffered heart attacks, said a study published in the European Heart Journal. Among those who had heart attacks, “micro and nanoplastics were detected in 84% of patients, compared with 40% of patients with chronic ischemic heart disease and 32% of patients with normal coronary arteries,” said a press release about the study.
The “highest levels of plastics were in blood drawn from the blocked artery itself, at the site of the blockage,” said Time. These tiny plastic particles are “found virtually everywhere in the environment, including the air we breathe, the water we drink and many foods we consume,” Pasquale Paolisso, the first author of the study, said in the release. “Scientists have begun to detect these particles in human tissues and organs, raising concerns about their potential health effects.”
The study also found that “people who smoke were six times more likely to have detectable micro and nanoplastics in the blood supplying their hearts than non-smokers,” David C. Gaze, a senior lecturer in chemical pathology at the University of Westminster, said in The Conversation. Therefore, along with the well-known detrimental effects of cigarettes, they “may also act as an efficient delivery system for microscopic plastic particles.”
The same pattern for smoking held for those who were exposed to bad air quality. “Both exposures appeared to amplify each other,” Paolisso and Emanuele Barbato, another author of the study, said to El País. “All patients who smoked and lived in areas with high air pollution had detectable plastics, compared with only one in eight of those who neither smoked nor were highly exposed.”
World of plastic
The study’s findings “do not prove that microplastics cause heart attacks, but they reveal a strong association between environmental exposures, microplastics in the blood and cardiovascular disease,” Barbato said in the press release. Microscopic plastic particles are present in “synthetic clothing fibers, tire wear, degraded packaging and countless other environmental sources,” Gaze said in The Conversation. But “at the moment, we cannot measure our exposure to plastics” in an accessible way, Rocco Montone, an interventional cardiologist at Fondazione Policlinico Gemelli in Rome, said to Time.
Microplastics were previously “found inside the liver, kidney, intestine and human brain, among other tissues,” said El País. Scientists have been interested in the health implications for some time. This study “reframes the issue of microplastics not as an isolated curiosity but as another link in a wider environmental exposome interconnected with the air we breathe and our habits,” the study authors said to El País.
The apparent connection between microplastics, smoking and air pollution also “underscores the urgent need to shift from isolated risk factor management toward comprehensive environmental health strategies,” said the study. Such strategies may include the “integration of air quality monitoring, anti-smoking interventions, plastic pollution reduction and exposomic assessment into cardiovascular disease prevention guidelines.”