How the Flu Causes Heart Health Complications


Influenza, more commonly known as the flu, is not just a severe cold. It’s a serious condition that can lead to various complications, including heart disease. Understanding the connection between the influenza virus and heart complications has become an increasingly important area of study in medical research.

The Connection between Flu and Heart Disease

Research shows that people with heart disease are nearly 10 times more likely to have a heart attack after coming down with the flu. This is because the flu causes stress on your body, which can affect your blood pressure, heart rate, and overall heart function.

There’s evidence that heart attacks happen more often during or immediately after an acute inflammatory illness, such as the flu. This risk is even higher for older people with a heart condition. Furthermore, those who have heart disease or risk factors for heart disease face an increased risk of heart attack and stroke.

How Flu Directly Infects the Heart

A study discovered that the flu virus could cause cardiac complications by directly affecting the heart. The electrical malfunctions and heart scarring seen in some of the sickest flu patients were found to be caused by direct influenza infection.

The heart complications included inflammation or damage to the heart muscle, fluid surrounding the heart, and a weakened heart pumping function. These complications can exacerbate pre-existing conditions or create new health problems for individuals previously unaware of any heart disease.

Sudden, Serious Cardiac Events Linked to Flu

A CDC study involving more than 80,000 adults hospitalized with flu found that sudden, serious heart complications were a significant risk. Such events could include a heart attack or cardiac arrest (sudden death).

These studies underscore the importance of recognizing the potential cardiovascular implications of a flu diagnosis, especially for individuals with pre-existing heart conditions or those at a high risk group of developing heart disease.

Influenza and Cardiovascular Disease: A Proven Link

Multiple previous studies, including three case-control studies, one cohort study, and one randomized controlled trial, have associated influenza with an increased risk of Coronary Heart Disease (CHD) and cardiovascular events.

Given this association, it’s crucial for patients and healthcare providers to understand the potential risks and take necessary precautions during flu season. This could include getting the annual flu vaccine, especially for those with heart disease or at risk for heart disease.

How to protect yourself and your heart from the flu

The most effective way to protect yourself and your heart from the flu is to get vaccinated. The Centers for Disease Control and Prevention (CDC) recommends that everyone 6 months or older receive a seasonal flu vaccine each year. It’s especially important for those with existing heart conditions or risk factors for developing heart disease.

Additionally, you should try to avoid close contact with people who are sick; wash your hands regularly; cover your nose and mouth when coughing or sneezing; avoid touching your eyes, nose, and mouth; clean and disinfect surfaces frequently; and stay home if you’re feeling unwell. Following these simple steps can go a long way in protecting yourself from the flu this season.

By heeding all of the available advice and taking precautionary measures, you can reduce your risk of developing heart complications from the flu. Knowing how to recognize signs of a potential problem is key in preventing serious consequences. If you experience any unusual symptoms, contact your doctor right away for an evaluation. Proper precautions and timely medical care are essential in maintaining good heart health during this cold and flu season.

When to visit the urgent care for the flu

If you or a loved one is experiencing any of the following symptoms, it’s important to visit an urgent care center for evaluation and treatment: high fever (over 101°F); shortness of breath; chest pain or tightness; fast heartbeat; confusion; bluish skin color. Additionally, if your flu-like symptoms worsen or last longer than two weeks, seek medical attention right away.

Timely treatment can reduce the intensity of the flu and help minimize its impact on your heart health. So don’t delay in seeking professional help if you’re experiencing any concerning symptoms this season. In addition to visiting your doctor or an urgent care center right away, make sure you take steps to prevent the spread of influenza by washing your hands regularly and avoiding close contact with those who are sick. By doing so, you can help keep yourself and your loved ones safe from the potential health complications of the flu this season.


In summary, the flu is not just a severe cold – it can lead to serious heart complications. These can range from increased blood pressure and heart rate to direct infection of the heart, leading to inflammation, damage, and even sudden, serious cardiac events. As such, preventative measures, such as getting a flu shot annually, should be a priority, especially for those with or at risk of heart disease.

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