Cholesterol, Blood Pressure and Heart Attack: The Winter Connection

Medically reviewed by Dr. Santosh Sinha

🚨 Emergency first: Chest pain or pressure, breathlessness, sweating, nausea, or pain spreading to the arm, jaw, neck or back can be a heart attack. Call 108 or go to the nearest hospital immediately.

Author’s perspective: Many people are told they have “borderline cholesterol” or “slightly high BP” and are not quite sure how worried to be. I think part of the problem is that these numbers are usually discussed separately, as if they were unrelated. In reality, they work together, and winter tends to make both worse. When I understood that link, these numbers stopped feeling abstract to me. I hope this post does the same for you.

Two silent risk factors

High cholesterol and high blood pressure usually cause no symptoms. Many people feel perfectly well until a heart attack or stroke happens. That is why they are often called “silent” risk factors, and why regular check-ups matter.

How cholesterol damages arteries

Cholesterol travels in the blood in particles called lipoproteins:

• LDL (“bad”) cholesterol can enter the walls of arteries and build up into fatty deposits called plaque.
• HDL (“good”) cholesterol helps remove excess cholesterol from the body.
• Triglycerides, another type of blood fat, are also linked with heart risk, especially when high along with low HDL.

Over years, plaque builds up and narrows the arteries, a process called atherosclerosis.

How blood pressure adds to the damage

High blood pressure means blood pushes harder against artery walls. This:

• Damages the inner lining of arteries, making it easier for LDL cholesterol to enter and form plaque
• Makes arteries stiffer over time
• Increases the strain on plaque, raising the chance it will crack
• Makes the heart work harder, increasing its oxygen needs

How a heart attack happens

When a cholesterol-rich plaque in a coronary artery ruptures, the body treats it like an injury and forms a blood clot over it. If the clot blocks the artery, blood flow to part of the heart muscle stops. That is a heart attack.

So, in simple terms:

• Cholesterol builds the plaque.
• High blood pressure damages the artery and stresses the plaque.
• A clot on a ruptured plaque causes the heart attack.

When both cholesterol and blood pressure are high, the risk is greater than with either one alone. Add diabetes or smoking, and the risk rises further.

Why winter adds to the risk

• Blood pressure tends to rise in cold weather as blood vessels narrow.
• Cholesterol levels may be slightly higher in winter in some people, possibly linked to diet and activity changes.
• Blood clots more easily in the cold.
• Festive food is often rich in salt, saturated fat and sugar.
• Less physical activity in colder months.
• Air pollution in northern India, linked with inflammation and heart risk.
• Morning surges in blood pressure, made stronger by cold.

Know your numbers

Ask your doctor what targets are right for you. Commonly discussed checks include:

• Blood pressure: checked regularly; your doctor will set your target.
• Lipid profile: total cholesterol, LDL, HDL and triglycerides.
• Blood sugar or HbA1c: diabetes greatly increases heart risk.
• Weight and waist size.

Targets vary depending on your overall risk. People who already have heart disease or diabetes often have stricter targets.

Practical steps to protect your heart

Diet

• Reduce salt, especially in pickles, papad and packaged snacks.
• Limit fried food, vanaspati, bakery items and red or processed meat.
• Choose whole grains, lentils, vegetables, fruits and nuts.
• Include sources of fibre and plant omega-3 such as flaxseed, oats and walnuts.
• Go easy on sweets during festivals.

Activity

• Aim for regular moderate activity, such as brisk walking, as your doctor advises.
• In winter, exercise later in the day or indoors when it is very cold or polluted.

Lifestyle

• Stop smoking.
• Limit alcohol.
• Sleep well and manage stress.
• Maintain a healthy weight.

Medicines

• Take prescribed blood pressure and cholesterol medicines regularly.
• Do not stop statins or blood pressure medicines without your doctor’s advice, even if your numbers improve, since improvement often reflects the medicine working.

Where flaxseed fits

Flaxseed provides plant omega-3 (ALA) and soluble fibre, which have been studied for modest effects on cholesterol and blood pressure. It can be a helpful part of a heart-friendly diet. For convenience, some people use Flax Seed Capsules. They are a dietary supplement, not a replacement for prescribed medicines. If you take blood thinners, blood pressure or diabetes medicines, check with your doctor before starting.

Warning signs: act immediately

• Chest pain, pressure or heaviness
• Pain spreading to the arm, jaw, neck or back
• Breathlessness
• Cold sweat, nausea or dizziness
• Sudden severe headache, weakness on one side or slurred speech (possible stroke)

Call 108 or go to hospital immediately.

Frequently asked questions

The bottom line

High cholesterol builds plaque, high blood pressure damages arteries and stresses that plaque, and a clot on a ruptured plaque causes a heart attack. Winter can push both numbers up. Know your numbers, eat wisely, stay active, take your medicines and never ignore chest pain.

Disclaimer: This article is for general information and is not medical advice. Chest pain is a medical emergency. Call 108. Never stop or change heart, cholesterol or blood pressure medicines without your doctor’s advice.