[Risk factors for cerebral infarction: current topics and new developments]

Shinichiro Uchiyama1

  • 1Department of Neurology, Neurological Institute, Tokyo Women's Medical University.

Insights

This review details established and emerging risk factors for ischemic stroke, including hypertension, diabetes, and genetic predispositions. Managing these factors is vital for preventing stroke, a leading cause of death and disability.

Area of Science:

  • Neurology
  • Cardiovascular Medicine
  • Genetics

Context:

  • Ischemic stroke remains a leading cause of death and disability globally.
  • Understanding evolving risk factors is critical for effective prevention strategies.
  • Established risk factors include hypertension, diabetes mellitus, hyperlipidemia, atrial fibrillation, smoking, and heavy alcohol consumption.

Purpose:

  • To review current topics and new developments in ischemic stroke risk factors.
  • To highlight both established and recently identified risk factors.
  • To emphasize the importance of risk factor management for primary stroke prevention.

Summary:

  • Established risk factors for ischemic stroke include hypertension, diabetes mellitus, hyperlipidemia, atrial fibrillation, cigarette smoking, and heavy alcohol drinking.
  • Emerging risk factors identified in recent studies include homocysteine, cardiac embolism sources (e.g., patent foramen ovale), antiphospholipid antibodies, lipoprotein abnormalities (Lp(a), remnant-like particle), insulin resistance/hyperinsulinemia, infectious agents (Chlamydia Pneumoniae), and C-reactive protein (CRP).
  • Genetic studies reveal that gene polymorphisms are significant risk factors for specific stroke subpopulations, underscoring stroke's polygenic nature.

Impact:

  • Effective management of identified risk factors is crucial for primary stroke prevention.
  • This knowledge aids clinicians in identifying at-risk individuals and implementing targeted interventions.
  • Advances in understanding stroke etiology contribute to reducing the global burden of stroke-related mortality and disability.

Related Concept Videos

Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
Stroke: Introduction and Types01:29

Stroke: Introduction and Types

A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...