Can Heart Disease Develop Without High Cholesterol? Cardiologist Busts The Myth

Many people believe that high cholesterol is the main cause of heart disease. While high cholesterol is an important risk factor, it is not the only one. In fact, some people with normal cholesterol levels still develop heart disease, while others with high cholesterol may never experience serious heart problems.

Heart disease develops because of several factors working together over time. Understanding these factors can help take better care of the heart, even if cholesterol levels are normal.

Is High Cholesterol the Only Cause of Heart Disease?

No. High cholesterol increases the risk of plaque building up in the arteries, but heart disease can develop even when cholesterol levels are within the normal range. A study published in the Journal of the American College of Cardiology shows that 50% of healthy people with normal cholesterol levels have an underlying heart disease. This indicates that high cholesterol is not the only trigger for cardiac conditions.

“Heart disease is caused by a combination of factors, including inflammation, damage to blood vessels, high blood pressure, diabetes, smoking, and unhealthy lifestyle habits. Even if cholesterol is normal, these factors can still damage the arteries and increase the risk of heart disease,” shares Dr Deebanshu Gupta, Cardiologist at Sarvodya Hospital, Jalandhar.

Other Major Risk Factors for Heart Disease

Apart from high cholesterol, several other risk factors hold equal weightage.

High Blood Pressure

High blood pressure forces the heart to work harder than normal. Over time, it can damage the walls of the arteries, making it easier for plaque to develop. According to the World Health Organization (WHO), many people with high blood pressure exhibit no symptoms, which is why regular health checks are important.

Diabetes

People with diabetes have a higher risk of heart disease because high blood sugar can damage blood vessels and nerves that control the heart. Even when cholesterol levels are healthy, poorly controlled diabetes can significantly increase the risk of heart attack and stroke.

Smoking

Smoking damages the lining of the arteries, reduces oxygen in the blood, and increases blood pressure. It also increases the likelihood of blood clotting. These changes greatly increase the risk of heart disease, regardless of cholesterol levels.

Also Read: How Often Should You Check Cholesterol?

Being Overweight

Carrying extra body weight, especially around the waist, raises the risk of high blood pressure, diabetes, and inflammation. These conditions place additional strain on the heart and blood vessels.

Lack of Physical Activity

Regular exercise helps keep the heart strong, improves blood flow, and supports healthy blood pressure and blood sugar levels. A lack of physical activity increases the risk of heart disease, even in people whose cholesterol is normal.

Unhealthy Diet

A diet high in processed foods, salt, sugar, and unhealthy fats can contribute to obesity, high blood pressure, and diabetes. These problems can lead to heart disease without necessarily causing high cholesterol.

Family History

Genetics also play a role. If close family members developed heart disease at a young age, your own risk may be higher, even if your cholesterol levels are healthy.

Stress

Long-term stress may contribute to heart disease by raising blood pressure and encouraging unhealthy habits such as smoking, overeating, or poor sleep. While stress alone is unlikely to cause heart disease, it can increase overall risk.

A study published in JAMA Network shows that high stress levels in patients with anxiety and depression increase their likelihood of developing cardiovascular diseases.

Can Healthy Cholesterol Levels Give a False Sense of Security?

Yes. Some people assume they have a healthy heart simply because their cholesterol test is normal. However, cholesterol is only one part of a person's overall heart health.

“Doctors look at several factors together when assessing heart disease risk. These include age, blood pressure, blood sugar, weight, smoking status, physical activity, family history, and medical conditions,” shares Dr Gupta.

Someone with normal cholesterol but uncontrolled high blood pressure or diabetes may still have a high risk of developing heart disease.

When To See a Doctor

Heart disease does not always cause symptoms in its early stages. If you experience the following symptoms, you must consult a doctor:

• Chest pain or discomfort
• Shortness of breath
• Pain spreading to the arm, shoulder, neck, jaw, or back
• Feeling unusually tired
• Dizziness or light-headedness
• Irregular heartbeat
• Swelling in the legs or ankles

Some people, particularly those with diabetes, may experience only mild or unusual symptoms. Any sudden or severe chest pain should be treated as a medical emergency.

How To Lower The Risk of Heart Disease?

Looking after your heart involves much more than controlling cholesterol. Healthy daily habits can make a big difference. Here are some simple changes that will help you safeguard your heart:

• Eat a balanced diet: Consume plenty of vegetables, fruit, wholegrains, beans, nuts, and lean sources of protein. Limit foods high in salt, added sugar, and saturated fat.
• Stay active: Aim for at least 150 minutes of moderate physical activity each week. Walking, cycling, swimming, and dancing are all good choices.
• Maintain a healthy weight: This will reduce pressure on the heart and lower the risk of diabetes and high blood pressure.
• Avoid smoking: Stopping smoking is one of the most effective ways to reduce the risk of heart disease.
• Limit alcohol: Drinking too much alcohol can raise blood pressure and contribute to weight gain. If you drink alcohol, do so in moderation.
• Get enough sleep: Adults should aim for around seven to nine hours of quality sleep each night.
• Reduce stress: Do whatever makes you happy, practise relaxation techniques, and maintain a good work-life balance to manage stress and support heart health.
• Get regular health check-ups: Routine health checks can identify problems before symptoms appear. Your doctor can prescribe tests based on your age, family history, and lifestyle.

Final Word

High cholesterol is an important risk factor for heart disease, but it is not the only one. Heart disease can develop even when cholesterol levels are normal because factors such as high blood pressure, diabetes, smoking, obesity, inactivity, poor diet, and family history also damage the heart and blood vessels. If you have any of these associated risks, you must take good care of your health and get regular check-ups to minimise the risk.