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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.
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...
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...
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...
Regulation of Stroke Volume01:27

Regulation of Stroke Volume

The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...

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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
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Published on: August 18, 2015

[Familial predisposition to stroke].

L A Chinybaeva, L K Karazhanova, M A Kapakova

    Zhurnal Nevrologii I Psikhiatrii Imeni S.S. Korsakova
    |November 7, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Familial predisposition significantly increases stroke risk. Relatives of stroke patients show higher rates of hypertension, diabetes, heart disease, and stroke, especially males, highlighting the need for targeted prevention programs.

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    Area of Science:

    • Neurology
    • Cardiovascular Medicine
    • Genetics

    Background:

    • Ischemic stroke is a significant health concern.
    • Understanding familial predisposition is crucial for effective prevention strategies.

    Purpose of the Study:

    • To investigate familial predisposition to ischemic stroke.
    • To assess the relative risk of cardiovascular risk factors in relatives of stroke patients.
    • To determine the influence of sex on these risk factors.

    Main Methods:

    • Interviewed 55 ischemic stroke patients (22 women, 33 men, mean age 61.14 years).
    • Utilized a control group of siblings of patients' spouses.
    • Compared the frequency of arterial hypertension, diabetes mellitus, ischemic heart disease, and stroke between patient relatives and controls.
    • Calculated relative risk (RR) for studied factors, analyzing sex-specific differences.

    Main Results:

    • Relatives exhibited significantly higher frequencies of arterial hypertension (+30.8%), diabetes mellitus (+76%), ischemic heart disease (+59.4%), and stroke (+41%) compared to controls.
    • Blood relatives showed substantially higher relative risk for all studied factors.
    • Male relatives demonstrated higher relative risk values for all investigated risk factors.

    Conclusions:

    • The study confirms a significant familial predisposition to stroke.
    • Family members of stroke patients represent a high-risk group.
    • These findings underscore the importance of implementing targeted stroke prevention programs for families of stroke patients.