Why Stroke Remains a Leading Cause of Death: Types, Risks, and Prevention

Stroke is a serious medical condition that remains one of the leading causes of death and disability worldwide. It often occurs suddenly, yet its consequences can last a lifetime.

What Is a Stroke?

According to Dr. Norsabihin Mohd Salleh, Consultant General Physician (Cardiovascular and Endocrine Care) at Selgate Specialist Hospital, Rawang, Malaysia, a stroke occurs when the blood supply to the brain is interrupted or reduced, depriving brain tissue of oxygen and essential nutrients.

Without adequate blood flow, brain cells can become damaged or die within minutes. Because of its sudden onset and severe consequences, stroke is often referred to as a “brain attack.”

The World Health Organization (WHO) defines stroke as a sudden disturbance of brain function that can cause permanent disability or death.

Stroke and Its Impact in Malaysia

Globally, stroke is recognized as a major cause of mortality and morbidity.
In Malaysia, stroke is reported as the third leading cause of death, following heart disease and cancer.

Clinical data show that:

• Ischaemic stroke is the most common type of stroke
• Hypertension is the most common risk factor
• Followed by diabetes mellitus as the second most significant risk factor

These findings highlight that most stroke cases are closely linked to non-communicable diseases and lifestyle-related conditions, many of which are preventable.Beyond being an individual health issue, stroke has become a kmajor public health concern, particularly in developing and middle-income countries.

Why Is Stroke So Dangerous?

The brain controls all vital body functions. When a part of the brain is damaged by stroke, the body functions governed by that area may be impaired.

Common stroke symptoms include:

• Facial drooping on one side
• Sudden weakness or paralysis of the arm or leg
• Slurred speech or difficulty speaking
• Visual disturbances
• Reduced level of consciousness

In clinical practice, there is a well-known phrase:

“Time lost is brain lost.”
Every minute of delayed treatment results in the loss of brain cells.

Types of Stroke

Stroke is generally classified into three main types:

1. Ischaemic Stroke

Ischaemic stroke is the most common form, accounting for approximately 80–85% of all stroke cases.

It occurs when a blood vessel supplying the brain becomes blocked, usually due to:

• Blood clots
• Fatty or cholesterol deposits (atherosclerosis)

In Malaysia, ischaemic stroke predominates, with hypertension as the leading risk factor, followed by diabetes mellitus.

2. Haemorrhagic stroke

Haemorrhagic stroke occurs when a blood vessel in the brain ruptures, causing bleeding within or around the brain.

Although less common, this type of stroke is more severe and carries a higher risk of death and long-term disability.

Common causes include:

• Uncontrolled hypertension
• Aneurysms
• Head trauma
• Excessive alcohol consumption

3. Transient Ischaemic Attack (TIA)

A Transient Ischaemic Attack (TIA) is often referred to as a “mini-stroke.”

The symptoms resemble those of a stroke but:

• Last only minutes to hours
• Do not cause permanent brain damage

However, TIA is a serious warning sign and indicates a high risk of a future major stroke if left untreated.

Stroke is a critical health condition that:

• Is a major cause of death and disability worldwide
• Ranks as the third leading cause of mortality in Malaysia
• Most commonly presents as ischaemic stroke
• Is strongly associated with hypertension and diabetes mellitus

The encouraging news is that many stroke risk factors are preventable and controllable. Managing blood pressure, controlling blood glucose levels, adopting a healthy lifestyle, and undergoing regular medical check-ups are key strategies in reducing the burden of stroke.

Understanding stroke is not meant to instill fear, but rather to promote awareness, early prevention, and better long-term quality of life.