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Regulation of Stroke Volume

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...

Ischemic Stroke l: Introduction

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: Pathophysiology

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: Introduction

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...

Hemorrhagic Stroke ll: Pathophysiology

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...

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Related Experiment Video

Updated: May 13, 2026

Stereological and Flow Cytometry Characterization of Leukocyte Subpopulations in Models of Transient or Permanent Cerebral Ischemia

Stereological and Flow Cytometry Characterization of Leukocyte Subpopulations in Models of Transient or Permanent Cerebral Ischemia

Published on: December 28, 2014

IL-6 and stroke recurrence in ischemic stroke.

Yuanfeng Jiang¹, Tao Fan¹

¹Spine Center, Sanbo Brain Hospital, Capital Medical University, Beijing, China.

Biomarkers in Medicine

|September 4, 2024

Summary

This summary is machine-generated.

Interleukin-6 (IL-6) shows promise as a biomarker for predicting stroke recurrence in patients with acute ischemic stroke. Higher IL-6 levels correlate with an increased risk of recurrent stroke events.

Keywords:

chinese interleukin-6 ischemic stroke stroke recurrence

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Last Updated: May 13, 2026

Stereological and Flow Cytometry Characterization of Leukocyte Subpopulations in Models of Transient or Permanent Cerebral Ischemia

Stereological and Flow Cytometry Characterization of Leukocyte Subpopulations in Models of Transient or Permanent Cerebral Ischemia

Published on: December 28, 2014

Isolation and Flow Cytometric Analysis of Immune Cells from the Ischemic Mouse Brain

Isolation and Flow Cytometric Analysis of Immune Cells from the Ischemic Mouse Brain

Published on: February 12, 2016

Two-vessel Occlusion Mouse Model of Cerebral Ischemia-reperfusion

Two-vessel Occlusion Mouse Model of Cerebral Ischemia-reperfusion

Published on: March 1, 2019

Area of Science:

Neurology
Biomarkers
Inflammation

Background:

Stroke recurrence poses a significant risk to patient outcomes.
Identifying reliable predictive biomarkers is crucial for secondary stroke prevention.

Purpose of the Study:

To assess the predictive capability of serum Interleukin-6 (IL-6) levels for stroke recurrence.
To investigate the association between IL-6 and recurrent ischemic stroke events.

Main Methods:

Prospective evaluation of 305 patients admitted within 48 hours of acute ischemic stroke onset.
Serum IL-6 levels measured at admission.
Stroke recurrence assessed at 3-month follow-up.

Main Results:

15.4% of patients experienced stroke recurrence within 3 months.
Each 1 pg/ml increase in serum IL-6 was associated with an 8% increased risk of recurrence (OR: 1.08, 95% CI: 1.04-1.11).
This association remained significant after adjusting for other factors (OR: 1.06, 95% CI: 1.02-1.10).

Conclusions:

Serum IL-6 is a valuable predictive biomarker for identifying patients at higher risk of stroke recurrence.
IL-6 measurement upon admission may aid in clinical decision-making for secondary stroke prevention.