How Winter Increases Stroke Risk?

Highlights:

Stroke is a condition of brain cell death due to disrupted blood supply to the brain, either due to blood clots or blood vessel leakage
Cold weather constricts blood vessels raising blood pressure and subsequently increasing the risk of blood clots and stroke //
Stroke can be avoided in the winter by staying warm, eating a healthy diet, exercising frequently, and managing medical disorders like diabetes and hypertension

Winter is a season of holidays and celebrations. The change in season not only adds colors to our lives but also brings several health hazards that increase the likelihood of strokes ().

In addition to significant risk factors such as age and health, falling temperatures can also increase the risk of stroke.

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Stroke Risk Calculator checks if you have hypertension, diabetes and heart failure and predicts the risk of stroke (cerebrovascular accident) in next 10 years.

‘Did you know? Every 40 seconds, someone in the U.S. has a stroke. Brace this winter with these stroke prevention tips. #winter #bloodclot #stroke #brainhealth #medindia’

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What is Stroke?

Stroke is a cerebrovascular accident that occurs when the blood supply to a part of the brain is disrupted leading to brain cell death. There are two types of stroke– Ischemic and Hemorrhagic. Ischemic stroke occurs due to a clot in the artery supplying blood to the brain and hemorrhagic stroke is caused by a leak in a blood vessel supplying the brain.

The early signs of stroke are weakness, tingling sensation, slurred speech, abnormal gait, an inability to balance, and difficulty in swallowing. The final blow is the paralysis that sets in on one side of the body.

Stroke
Stroke can cause permanent disability and it is important to recognize its early warning signs to stop its progress. Early warning signs of stroke include sudden weakness of facial muscles.

How Cold Weather Spurs the Risk of Stroke?

Regular daily tasks, such as shoveling snow off your driveway or getting out of your car in the winter, can often increase blood pressure, which is a major risk factor for stroke. Wintertime increases the risk of stroke for the following reasons:

Cold weather makes blood vessels constrict, which can raise blood pressure – a major risk factor for stroke.
Coronary arteries like other arteries constrict during winter causing poor blood supply to the heart muscle resulting in heart attack or myocardial ischemia. This subsequently decreases the blood flow to the brain and can increase stroke risk.
Blood tends to thicken and become stickier during extreme cold, which makes it easier to clot.
High humidity in the atmosphere can cause dehydration, elevating the risk of blood clot formation.

In general, stroke rates follow a pattern: they are greater in the winter and lower in the summer. Cold spells increase the risk of stroke, in particular ischemic stroke.

Tips to Stay Warm & Prevent Stroke During Winter

Although weather is beyond our control, there are modifiable risk factors that can be reduced.

The following tips are advised to prevent stroke during winter:

To stay warm, dress in layers and keep core temperature high to maintain blood flow to extremities
Brace your legs well with winter essentials to maintain blood circulation getting to your feet, especially when stepping outdoors
Keep your health conditions such as high blood pressure, atrial fibrillation, type 2 diabetes, and elevated cholesterol under check
Eat a healthy diet and engage in regular physical activity
Limit alcohol intake

It's also critical to remain aware of the warning indications of a stroke. Seek emergency medical attention if someone is experiencing arm weakness, slurred speech, sagging of the face, balance issues, or eyesight issues.

Understanding the symptoms and indicators of strokes as well as modifiable risk factors may help patients experience a less severe outcome from stroke events. This could also alter the perception of caregivers and at-risk patients to weather changes.

Disclaimer: The content on this page is meant to be an informative resource and is not meant to replace advice from a medical professional. It is always best to consult a healthcare provider with any concerns

Reference:

Risk of ischemic and hemorrhagic stroke in relation to cold spells in four seasons - (https://pubmed.ncbi.nlm.nih.gov/36959548/)

Source-Medindia

How to Deal with a Stroke
Stroke is a brain attack, which occurs when the blood supply to the brain is interrupted. It affects all age groups; according to the WHO, 15 million people are affected by stroke annually.