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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.
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

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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.
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

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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
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: Feb 15, 2026

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

Bethany D Sanders, Melissa G Davis, Sharon L Holley

    Journal of Midwifery & Women'S Health
    |January 26, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Pregnancy increases stroke risk in women. This guide helps maternity providers recognize and treat stroke symptoms in pregnant and postpartum patients to improve outcomes.

    Keywords:
    cerebrovascular accidentgestational hypertensionhematologic changes of pregnancyhemorrhagic strokehypertensionischemic strokepreeclampsiapregnancystroketransient ischemic attackvenous thromboembolism

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    Area of Science:

    • Neurology
    • Obstetrics
    • Public Health

    Background:

    • Stroke is a leading cause of death in women and a significant cause of pregnancy-associated mortality.
    • Physiological changes during pregnancy elevate stroke risk.
    • Pregnancy-related stroke occurs approximately every 2 years in facilities with 3300 annual births.

    Purpose of the Study:

    • To review the assessment and initial treatment of stroke in pregnant and postpartum women.
    • To provide guidance for subsequent maternity and primary care management.
    • To equip perinatal care providers for timely intervention and improved patient outcomes.

    Main Methods:

    • Review of current literature on cerebrovascular accidents in pregnant and postpartum populations.
    • Analysis of stroke pathophysiology, presenting symptoms, and treatment modalities.
    • Guidance development for initial assessment, management, and follow-up care.

    Main Results:

    • Ischemic and hemorrhagic strokes share similar symptoms but differ significantly in pathophysiology and treatment.
    • Timely assessment and intervention are crucial to mitigate brain damage, reduce morbidity, and prevent mortality.
    • Comprehensive care guidance is needed for front-line perinatal and primary care providers.

    Conclusions:

    • Maternity care providers must be skilled in assessing and treating stroke symptoms in pregnant and postpartum women.
    • Understanding the nuances of ischemic versus hemorrhagic stroke is vital for effective management.
    • Standardized protocols and continued education are essential for improving care and outcomes for women experiencing pregnancy-related stroke.