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Related Concept Videos

Regulation of Stroke Volume01:27

Regulation of Stroke Volume

4.8K
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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Cardiac Output and Stroke Volume01:11

Cardiac Output and Stroke Volume

4.5K
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.
In an average resting adult male, the typical cardiac...
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Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

3.2K
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
Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
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Related Experiment Video

Updated: Jan 22, 2026

A Novel Use of Three-dimensional High-frequency Ultrasonography for Early Pregnancy Characterization in the Mouse
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Stroke in pregnancy.

B S Liew1, A A Ghani2, X You2

  • 1Hospital Sungai Buloh, Department of Neurosurgery, Sungai Buloh, Selangor, Malaysia. liew@doctor.com.

The Medical Journal of Malaysia
|July 1, 2019
PubMed
Summary
This summary is machine-generated.

Stroke risk increases in pregnant women, particularly for hemorrhagic types during the peripartum and postpartum periods. Prompt neuroimaging and prophylactic anticoagulants are crucial for managing acute stroke in pregnancy.

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Area of Science:

  • Neurology
  • Obstetrics
  • Vascular Medicine

Background:

  • Stroke is rare in young adults but incidence rises in pregnant women.
  • Pregnancy, specifically peripartum and postpartum periods, elevates stroke risk.
  • Hemorrhagic stroke risk is notably higher than ischemic stroke during these periods.

Purpose of the Study:

  • To highlight the increased risk of stroke in pregnant women.
  • To emphasize the importance of timely diagnosis and treatment.
  • To review current management strategies for acute stroke during pregnancy.

Main Methods:

  • Review of existing literature on stroke in pregnancy.
  • Analysis of risk factors and stroke types (hemorrhagic vs. ischemic).
  • Discussion of diagnostic priorities and treatment options.

Main Results:

  • Hemorrhagic stroke risk is three times higher compared to the antenatal period.
  • Neuroimaging is essential for diagnosis and guiding treatment.
  • Anti-platelet and thrombolytic agents are potential treatments.

Conclusions:

  • Stroke during pregnancy requires prompt neuroimaging and consideration of prophylactic anticoagulants for high-risk individuals.
  • Current evidence is insufficient for definitive management guidelines.
  • Further research is needed to establish clear treatment protocols for stroke in pregnant women.