Flu Poses Underestimated Risk to Heart Health, Research Shows
Influenza, commonly known as the flu, may pose a more significant threat to cardiovascular health than previously understood. Recent research indicates that the virus can directly impact the heart, potentially leading to serious complications, even in individuals without pre-existing heart conditions. This finding underscores the importance of flu prevention and timely treatment, particularly for vulnerable populations.
A study conducted by researchers at the Icahn School of Medicine at Mount Sinai in Novel York City revealed a link between influenza infections and heart damage. The research, published in the journal Immunity, found that specific immune cells play a crucial role in how the flu virus affects the heart. According to the study, when the virus reaches the heart tissue, it can cause the death of heart muscle cells, which are essential for the organ’s ability to function properly.
Researchers observed a notable increase in heart attacks during flu season, prompting the investigation into the underlying mechanisms. “Since years It’s known that the frequency of heart attacks increases during the flu season,” said study leader Filip Swirski. “But apart from clinical intuition, there is little evidence for the underlying mechanisms of this phenomenon.”
The study analyzed data from 35 patients who died following influenza infections. A significant portion of these patients had pre-existing cardiovascular issues, such as high blood pressure, suggesting a correlation between heart health and the risk of severe outcomes from the flu. Researchers discovered that certain white blood cells, specifically precursors to DC3 dendritic cells, become infected with the flu virus in the lungs and then migrate to the heart.
Instead of fighting the virus, these immune cells release a protein that promotes inflammation, contributing to heart damage. This process, researchers explained, is akin to a “Trojan horse” effect, where the immune system inadvertently exacerbates the problem. Further details on the mechanism were published in Spiegel.
The World Health Organization (WHO) estimates that influenza viruses cause approximately one billion infections globally each year, with 290,000 to 650,000 resulting in death. As reported by Berliner Morgenpost, these figures highlight the widespread impact of the virus and the need for increased awareness of its potential complications.
Experts emphasize the importance of vaccination as a preventative measure, particularly for individuals with pre-existing heart conditions. The Deutsche Herzstiftung e.V. notes that people with cardiovascular diseases are particularly vulnerable to the dangers of influenza and other infections.
Distinguishing between a common cold and the flu is too crucial. While a cold typically involves milder symptoms and a gradual onset, the flu presents with sudden, severe symptoms like high fever, muscle aches, and fatigue. Prompt medical attention and antiviral treatment can help mitigate the risk of complications, including those affecting the heart.
