Air Pollution & Heart Disease

Air pollution is considered to be a silent killer that affects our daily lives. From the exhaust fumes of vehicles to industrial emissions and even natural sources like dust storms, the air we breathe is often contaminated with many harmful particles and gases. While we often associate respiratory problems with air pollution, its impact on heart health is equally concerning.

Effect of Air Pollution on the Heart

Particulate matter (PM) and gaseous pollutants are known to cause great harm to the cardiovascular system. Fine particulate matter, known as PM2.5, consists of tiny particles less than 2.5 micrometers in diameter. These minuscule particles can penetrate deep into the lungs and even enter the bloodstream. Once the particles enter the bloodstream, they can trigger a cascade of reactions that contribute to the development and progression of heart disease.

  1. Inflammation: PM2.5 and other pollutants can induce inflammation in the arteries. Inflammatory responses can lead to the buildup of plaque in the arteries, a condition known as atherosclerosis. Atherosclerosis narrows the arteries and restricts blood flow to the heart, increasing the risk of heart attacks and strokes.
  2. Blood pressure: Air pollution has been linked to increased blood pressure. Over time, elevated blood pressure can strain the heart and lead to conditions like hypertension and hypertensive heart disease. These conditions make the heart work harder and can result in heart failure.
  3. Irregular heart rhythms: Some studies have suggested that air pollution may contribute to irregular heart rhythms, known as arrhythmias. These irregular heartbeats can be life-threatening, especially in individuals with pre-existing heart conditions.
  4. Heart attacks: The risk of heart attacks, or myocardial infarctions, is significantly higher in areas with high levels of air pollution. Pollutants can trigger the rupture of existing plaques in the arteries, leading to blood clots that can block blood flow to the heart muscle.
  5. Heart failure: Air pollution can aggravate existing heart conditions, such as heart failure, by increasing the workload on the heart. Heart failure occurs when the heart cannot pump blood effectively, leading to a buildup of fluid in the lungs and other tissues.

Who Is at Risk?

Leading cardiovascular surgeon Dr. Ramji Mehrotra cites the example of the high levels of air pollution in New Delhi and is of the opinion that while air pollution poses a risk to everyone, certain groups are more vulnerable to its adverse effects on the heart. These include:

  1. Elderly individuals: Older adults are more likely to have pre-existing heart conditions, making them more susceptible to the harmful effects of air pollution.
  2. Children: Developing hearts in children are more sensitive to environmental stressors, including air pollution, which can have long-term implications for their heart health.
  3. People with pre-existing heart conditions: Those with conditions like coronary artery disease, hypertension, and heart failure are at greater risk of experiencing adverse cardiovascular effects from air pollution.
  4. Individuals with low socioeconomic status: People in lower-income communities often face higher exposure to air pollution due to factors like living closer to industrial areas and having limited access to healthcare resources.

Reducing the Risk

Considering the link between air pollution and heart disease, it is crucial to take steps to reduce the risk. Here are some strategies to protect your heart:

  1. Stay informed: Monitor local air quality and avoid outdoor activities on days when air pollution levels are high.
  2. Use air purifiers: Indoor air pollution can also be a concern, so using air purifiers at home can help reduce exposure to harmful particles.
  3. Reduce vehicle emissions: Carpooling, using public transportation, and driving fuel-efficient vehicles can help reduce the emissions that contribute to outdoor air pollution.
  4. Plant trees and vegetation: Greenery can act as natural air filters and improve local air quality. Supporting and participating in urban reforestation efforts can make a difference.
  5. Advocate for clean energy: Supporting policies and initiatives that promote clean energy sources and reduce emissions is essential for long-term improvement in air quality.
  6. Lead a heart-healthy lifestyle: A heart-healthy diet, regular exercise, and stress management can help mitigate the effects of air pollution on heart health.
  7. Avoid Smoking and tobacco use.


Dr. Mehrotra is of the opinion that Air Pollution is not only a threat to our respiratory health but also a silent contributor to heart disease. The tiny particles and harmful gases in polluted air can have profound and lasting effects on the cardiovascular system, increasing the risk of heart attacks, high blood pressure, and other heart-related conditions. Protecting your heart from air pollution involves a combination of individual actions, community efforts, and policy changes. By taking these steps, we can breathe easier and ensure a healthier future for our hearts.

Health Issues in Teenagers because of Breathing Polluted Air

Air pollution is very detrimental to human health. According to World Health Organization (WHO), air pollution is the reason for the death of nearly seven million people worldwide every year. In big cities like Delhi, 9 out of every 10 people currently breathe air with pollutants that exceed the WHO’s guideline limit.

Air pollution can cause great damage not only to lungs but can impact other organs including heart. Several diseases, birth defects and lower reproductive rates can be attributed to air pollution.

Effect on Air Pollution on Heart

Air pollutants can travel into the bloodstream through lungs and to the heart. This increases the risk of developing heart and circulatory diseases. The pollutants can damage the blood vessels and make them narrow, making it difficult for the blood to flow freely.

Other effects of pollutants can include blood clotting and increased blood pressure. Regular exposure to air pollution can affect the heart’s electrical system and cause irregular heartbeat or heart arrhythmia.

Patients with existing heart and circulatory conditions may have an increased risk of heart attack or stroke.

Impact of Pollution on Teenagers

According to medical research, air pollution can trigger irregular heartbeat in healthy teenagers that can be potentially fatal. This can be caused by fine particles of less than 2.5 microns in size that can be easily inhaled into the lungs. People exposed to pollution over a period of time are at risk of developing cardiovascular disease and other complications.

Dr. Ramji Mehrotra, India’s renowned Heart Specialist, says that these fine air particles can disrupt the autonomic nervous system that controls the rhythms of heartbeats. According to Dr. Mehrotra, premature atrial contractions and premature ventricular contractions are two types of irregular heart rhythms.

Premature atrial contractions, in which heartbeat originates from atria, increase the risk of atrial fibrillation and possible stroke. Premature ventricular contractions, in which heartbeat originates from ventricles, also raise the risk of heart attack, heart failure and cardiac death.

Studies on teenagers have found that due to regular exposure to fine particulate matter, around 80 percent of them experience at least one irregular heart rhythm while over 40 percent experience both.

Addressing the Issue

Dr Ramji Mehrotra says that teenagers are prone to irregular heartbeats but most of them are not aware of it. If any youngster experiences any of the conditions like pounding of the heart or fast heartbeat or skipping of a heartbeat, it is essential to seek medical advice. The doctor is the right person to diagnose the issue and suggest the right treatment.

Dr. Mehrotra also recommends wearing face masks in outdoor conditions and while travelling to reduce the impact of pollution. It is also advised to avoid commuting during peak hours when the pollution is at the maximum level.