Microplastics detected in blood of 84% of heart attack patients

Microscopic plastic fragments may pose a direct threat to human cardiovascular health. In a recent investigation published in the European Heart Journal, Italian scientists found high concentrations of micro- and nanoplastics in the blood of individuals who had suffered severe cardiac events.

The study examined 61 patients undergoing coronary angiography for suspected cardiovascular conditions. To understand whether plastic pollution accumulates directly in the coronary arteries—the vital blood vessels that supply oxygen to the heart muscle—researchers analyzed blood samples drawn directly from these vessels. Participants were categorized into three distinct diagnostic groups: those experiencing an acute heart attack, those with chronic coronary syndrome, and a healthy control group with clear coronary arteries.

The results revealed a striking contrast between the cohorts. Tiny plastic particles were detected in the coronary blood of over 84% of acute heart attack patients. By comparison, detection rates dropped sharply to 40% among patients with chronic coronary conditions and just 32% in individuals without arterial disease.

Beyond mere presence, heart attack survivors carried a significantly wider diversity of plastic polymers. Polyethylene—the world’s most widely produced plastic, commonly used in food packaging, single-use containers, and synthetic materials—accounted for 97% of all identified particles.

The research team also examined how lifestyle and environmental exposures impact plastic uptake. The analysis demonstrated that tobacco users were far more likely to harbor synthetic micro-particles in their circulation. Similarly, participants with chronic, long-term exposure to particulate matter air pollution showed higher rates of vascular contamination.

Researchers hypothesize that smoke inhalation and atmospheric pollution damage lung tissue barriers, making it significantly easier for airborne microplastics to cross into the pulmonary bloodstream and travel directly to the heart.

While the findings establish a compelling link between environmental exposures, vascular plastic accumulation, and acute cardiac events, researchers stress that the data demonstrates correlation rather than direct causation.

Previous research indicates that microplastics provoke systemic inflammation, immune dysregulation, and oxidative stress—key biological mechanisms involved in arterial plaque buildup and cardiovascular disease. The authors emphasize that larger clinical trials with long-term monitoring are required to determine whether plastic pollution acts as an active driver of heart failure or serves as a biomarker for elevated environmental risk.

Source:

European Heart Journal