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Related Concept Videos

Regulation of Stroke Volume01:27

Regulation of Stroke Volume

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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.
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Ischemic heart disease occurs when the heart's blood supply dwindles, causing an ominous lack of oxygen and nutrients. This deficiency, stemming from reduced or obstructed blood flow, spells danger, leading to heart muscle damage and dysfunction.
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Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
Preload
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Cardiac Output and Stroke Volume01:11

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Cardiac output (CO) is an integral aspect of human physiology, reflecting the heart's efficiency and responsiveness to the body's needs. It represents the volume of blood that the left or right ventricle ejects into the aorta or pulmonary trunk each minute. The CO is calculated by multiplying the heart rate (HR)—the number of heartbeats per minute—by the stroke volume (SV)—the amount of blood pumped out with each heartbeat.
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Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

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Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
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Updated: Feb 24, 2026

Transient Middle Cerebral Artery Occlusion Model of Neonatal Stroke in P10 Rats
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Juvenile Stroke.

Florian Schöberl1, Peter Arthur Ringleb, Reza Wakili

  • 1Neurological Clinic and Policlinic, Großhadern Hospital, Ludwig-Maximilians-Universität München; Neurological Clinic, Heidelberg University Hospital; Medical Clinic and Policlinic I, Großhadern Hospital, Ludwig-Maximilians-Universität München; German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, München; Department of Cardiology and Angiology, Westdeutsches Herz- und Gefäßzentrum Essen, Essen University Hospital; Clinic of Neurology, Hertie Institute for Clinical Brain Research (HIH), University Hospital Tübingen; Institute for Stroke and Dementia Research (ISD), Großhadern Hospital, Ludwig-Maximilians-Universität München.

Deutsches Arzteblatt International
|August 25, 2017
PubMed
Summary
This summary is machine-generated.

Juvenile stroke affects young adults, with cardiogenic emboli and vascular dissection as common causes. Diagnosis and treatment remain challenging, highlighting the need for further research.

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Area of Science:

  • Neurology
  • Vascular Medicine
  • Public Health

Background:

  • Juvenile stroke (ages 18-55) impacts 30,000 annually in Germany, causing significant mortality and morbidity.
  • The causes of stroke in younger individuals are more diverse than in older populations.

Purpose of the Study:

  • To review the causes, diagnosis, and treatment of juvenile stroke.
  • To highlight diagnostic uncertainties and the need for tailored approaches.

Main Methods:

  • Selective PubMed search of pertinent publications.
  • Review of current guideline recommendations.

Main Results:

  • Common causes include cardiogenic emboli (25%) and vascular dissection (20%).
  • Cryptogenic strokes (25-50%) and embolic stroke of undetermined source (ESUS) (20-30%) are prevalent.
  • Acute ischemic stroke treatment involves rapid vascular recanalization; long-term outcomes are often poor, with only 40% returning to work.

Conclusions:

  • High rates of cryptogenic stroke and ESUS indicate diagnostic and therapeutic gaps.
  • Identifying rare causes requires significant diagnostic effort.
  • Individualized diagnostic strategies, including cardiac monitoring, are crucial.