Scientists have discovered what they found in the blood of heart attack survivors.

Scientists have discovered that survivors of heart attacks contain higher levels of microplastics in their blood, raising concerns among experts. A study conducted by researchers at the University of Campania in Italy found that individuals who had survived severe heart attacks showed increased concentrations of tiny plastic particles in their bloodstream. These findings suggest that exposure to microplastics could pose an overlooked threat to cardiovascular health. The research, published in the European Heart Journal, examined a small sample of 61 patients in Italy and revealed that microplastics and nanoparticles were present in the blood of 84 percent of those with heart attacks. This contrasts with lower rates observed in patients with chronic ischemic heart disease and those with normal coronary arteries. The study tracked participants' smoking habits and their exposure to air pollution over the previous two years. Blood samples were collected from vessels supplying the heart, as well as other parts of the body. Dr. Pasquale Paolisso, lead author of the study from the Sant’Andrea Hospital and the University of Rome Sapienza, noted that microplastics are now ubiquitous in the environment, including in the air we breathe, the water we drink, and many everyday foods. He emphasized that while scientists have begun identifying these particles in human tissues and organs, much remains unknown about their potential effects on health. The researchers acknowledged that very little is known about whether such microscopic plastic fragments are present in the blood circulating through the arteries that supply the heart. According to the study's results, smokers had six times greater odds of having plastic detected in their blood compared to non-smokers. Higher levels of microplastics were also recorded among individuals exposed to elevated air pollution levels for longer periods. The Independent reported that plastic particles were found in the blood of every patient who smoked and lived in areas with high air pollution. In contrast, only one in eight non-smokers living in less polluted regions showed similar findings. Researchers believe this pattern might indicate that smoking and air pollution facilitate the transfer of particles from the lungs into the bloodstream. Patients who had suffered heart attacks appeared to have a greater variety of plastic types in their blood, with polyethylene, commonly used in packaging, being the most frequently identified. Despite these findings, the study did not establish a direct causal link between microplastics and heart attacks. Emanuele Barbato, another researcher from the University of Rome Sapienza, stated that the results highlight a strong association between environmental exposure, microplastic presence in the blood, and cardiovascular diseases. However, he stressed that the data does not prove that microplastics cause heart attacks. The team noted that further research is needed to determine the exact mechanisms by which these particles might influence cardiac function. Barbato added that the history of smoking was strongly linked to the presence of microplastics in the blood. His team suggested that smoking might ease the entry of microplastics and nanoparticles into the bloodstream via the lungs, while air pollution could act similarly. Other scientists, however, cautioned against overinterpreting how the plastic particles were measured. Kevin Thomas, professor and director of the Queensland Alliance for Environmental Health Sciences at the University of Queensland, warned that the method used might not reliably distinguish certain types of plastics from natural fats in the blood. He pointed out that it is equally possible that the observed particles are not actually microplastics but rather naturally occurring substances.