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Related Concept Videos

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 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...
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...
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...
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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Related Experiment Video

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Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability
09:11

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Stroke in the very old.

I Noone1, D O'Shea, M Crowe

  • 1St. Vincent's University Hospital, Elm Park, Dublin. i.noone@st-vicents.ie

Irish Medical Journal
|March 29, 2008
PubMed
Summary
This summary is machine-generated.

Stroke significantly impacts older adults (over 80 years), leading to higher mortality and longer hospital stays. Specialized stroke services are crucial for this growing demographic to improve outcomes and prevention.

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Area of Science:

  • Geriatric Medicine
  • Neurology
  • Public Health

Background:

  • Stroke is a leading cause of death and disability worldwide.
  • The proportion of elderly individuals (over 80 years) experiencing stroke is increasing.
  • Outcomes for stroke patients over 80 years are often poorer compared to younger patients.

Purpose of the Study:

  • To analyze the characteristics and outcomes of stroke admissions in patients over 80 years.
  • To compare the outcomes of stroke in patients over 80 years versus those under 80 years.
  • To highlight the need for improved stroke services for the elderly population.

Main Methods:

  • Prospective analysis of 614 consecutive stroke admissions.
  • Data collected included patient demographics, comorbidities, length of stay, discharge destination, and mortality.
  • Comparison of outcomes between patients aged over 80 years and those under 80 years.

Main Results:

  • Patients over 80 years constituted 43% of stroke admissions.
  • Higher mortality (27% vs 9%), longer length of stay, and increased discharge to extended nursing care were observed in patients over 80 years.
  • Pre-stroke dependency and atrial fibrillation were more prevalent in the older cohort.

Conclusions:

  • Stroke in patients over 80 years is common and associated with significantly worse outcomes.
  • The elderly population experiences higher mortality, prolonged hospitalization, and greater need for post-discharge care after stroke.
  • Development of specialized stroke services is essential to optimize prevention and improve outcomes for the aging stroke population.