Why Heart Attacks Are More Common in Winter

Have you ever noticed how hospitals seem busier during the winter months? When temperatures drop, the emergency rooms often see a surge in heart attack cases. And it is not just a coincidence! 

The connection between cold weather and heart attacks has been documented for decades. Cardiovascular diseases tend to shoot up during the colder winter months for many reasons. ¹ Understanding these reasons could literally save your life! Read on further to understand why we see a higher incidence of heart attacks during winter and how to stay safe. 

Key Takeaways

• Heart attack cases rise in winter due to falling temperatures and increasing cardiovascular strain.
• Every 1°C drop in temperature is linked to higher heart-related deaths and illness worldwide.
• Cold weather causes blood vessels to constrict, raising blood pressure and cardiac workload.
• Low temperatures make blood thicker, increasing the risk of clot formation.
• Sudden strenuous activities like snow shovelling significantly stress the heart.
• People with heart disease, older adults, and sedentary individuals face a higher winter risk.
• Warning signs include chest pain, breathlessness, dizziness, nausea, cold sweats, and fatigue.
• Layered clothing, proper warm-ups, hydration, and avoiding alcohol help reduce risk.

Understanding the Winter-Heart Connection

The link between heart problems and winter has been researched for many years. As per research, deaths due to coronary heart disease, circulatory problems and heart attacks rose as temperatures fell. Every 1-degree Celsius drop in temperature came with a 0.49% increase in deaths from heart problems. ²

Whether you live in freezing Alaska or sunny California, winter heart health remains a critical concern everywhere. Low temperatures had the strongest impact on deaths caused by coronary heart disease. ³

Why Heart Attacks Spike During Winter

The reasons why heart attacks spike during winter could be many. It depends on how your body responds to cold. The main reasons could be:

Blood Vessel Constriction

Cold temperatures cause vasoconstriction and tachycardia, both resulting in a rise of cardiac work and blood pressure. ⁴ When air temperatures drop, blood vessels constrict to prevent heat loss and to keep more blood around the body’s core, but this increases the blood pressure. High blood pressure could lead to a heart attack or a stroke. ⁵  

Increased Blood Clotting

Cold temperatures also make your blood thicker. Extreme cold may cause your blood to thicken and get more prone to clotting, thereby raising the risk of stroke or heart attack. 

Physical Exertion in Cold Weather

As per research, strenuous exertion such as snow shovelling, etc., increases the workload on the heart. People are normally not used to this kind of physical activity, adding a lot of stressors to the heart, thereby increasing the risk of a cardiac attack. ⁶

Who Is at Highest Risk During Winter?

While everyone faces increased cold-weather cardiac risk during winter, certain groups need to be especially careful:

1. People with Existing Heart Conditions

People with pre-existing coronary artery disease, high blood pressure or heart failure conditions are at a higher risk during winters. Cold weather reduces myocardial oxygen supply in the coronary artery disease patients leading to ischemia. Exercising or any kind of strenuous physical activity in cold weather also augments the cardiac workload more than when performed in warmer weather conditions. ⁷ 

2. Older Adults

Older adults with chronic illnesses such as diabetes which prevents proper blood flow, or those who take medications that make it difficult for them to stay warm, or those who are very old and have low muscle mass and hence not able to shiver effectively and generate body heaty heat, are at more risk of heart attacks in cold temperatures. ⁸

3. Sedentary Individuals

Those individuals who are otherwise not regularly active should avoid sudden physical exertion in cold weather. 

Early Warning Signs of a Winter Heart Attack

Recognising the early warning signs of a heart attack can save your life. Chest pain is the most common symptom of a heart attack, where the pain travels from your chest to your arms, shoulder, neck, teeth, jaw, belly area and back.  ⁹ 

However, sometimes the warning signs or symptoms could occur hours, days or weeks in advance. Chest pain or pressure that doesn’t go away could be an early warning sign.  ¹⁰ 

Additional symptoms include: 

• Shortness of breath
• Nausea or vomiting
• Lightheadedness or dizziness
• Breaking out in a cold sweat
• Unusual fatigue (especially common in women)

How to Protect Your Heart During Winter 

Protecting your heart from winter-related heart attacks does not mean that you hibernate indoors until summer. Here is a practical guide with doable strategies:

Dress in Layers

To prevent hypothermia, dress up in layers to trap air in between layers of warm clothing, thereby forming a protective insulation. 

Warm Up Before Exercise

Never immediately start strenuous activity in cold weather without a warm-up. A moderate aerobic activity helps to increase heart rate and breathing at the beginning of the activity to ensure the heart does not go into stress. 

Stay Hydrated

Don’t forget to drink water when exercising in cold weather, as proper hydration helps the heart pump blood efficiently. 

Avoid Alcohol Before Outdoor Activities

Do not drink alcoholic beverages before or immediately after shovelling, as alcohol may increase a person’s sensation of warmth, and they may underestimate the extra strain their body is under in cold weather. 

When to See a Doctor or Get Tested

Don’t wait for symptoms to appear. Consult a doctor if you have a medical concern and would need to engage in strenuous physical activity in cold weather. 

Consider getting tested if you:

• Are over 40 with cardiovascular risk factors
• Have a family history of heart disease
• Experience any chest discomfort during physical activity
• Have diabetes, high blood pressure, or high cholesterol
• Are sedentary and planning to increase winter activity

LifeCell Diagnostics offers comprehensive cardiac screening tests, such as the Ayushman Hypertension Care, that can help identify risks before they become emergencies. Tests like lipid profiles, cardiac markers, and ECG screenings provide valuable insights into your heart health.

Conclusion: Your Heart Needs Extra Care in Winter

Winter doesn't have to be the most dangerous season for your heart. By understanding why heart attacks spike during cold weather and taking proactive steps to protect yourself, you can significantly reduce your risk.

Remember: cold weather puts extra strain on your heart through multiple mechanisms - vasoconstriction, increased blood clotting, physical exertion, and reduced activity levels. But the right practical strategies can help you enjoy your winters safely. 

With LifeCell Diagnostics' convenient home sample collection and comprehensive cardiac testing, there's no reason to delay checking your heart health. So book your test today! For more information, visit LifeCell Diagnostics. 

FAQs

Why do heart attacks increase more in winter?

Heart attacks increase in winter due to multiple factors: cold temperatures cause blood vessels to constrict and blood pressure to rise, blood becomes thicker and more prone to clotting, and physical exertion like snow shovelling strains the heart more in cold weather. 

How to protect your heart during the winter?

Protect your heart by dressing in warm layers to maintain body temperature, warming up properly before any physical activity, avoiding sudden strenuous exertion like heavy snow shovelling, staying hydrated and limiting alcohol before outdoor activities.