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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...

Cardiac Output and Stroke Volume

Cardiac Output and Stroke Volume

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...

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

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 2, 2026

The Mouse Stroke Unit Protocol with Standardized Neurological Scoring for Translational Mouse Stroke Studies

The Mouse Stroke Unit Protocol with Standardized Neurological Scoring for Translational Mouse Stroke Studies

Published on: February 7, 2025

Stroke.

Avril Mansfield¹, Elizabeth L Inness¹, William E Mcilroy²

¹Toronto Rehabilitation Institute, University Health Network and Department of Physical Therapy, University of Toronto, Toronto, ON, Canada.

Handbook of Clinical Neurology

|November 29, 2018

Summary

This summary is machine-generated.

Stroke survivors often face challenges with balance and walking, increasing fall risk. Rehabilitation interventions can significantly improve mobility, independence, and quality of life after a stroke.

Keywords:

accidental falls gait mobility limitation posture stroke stroke rehabilitation walking

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Area of Science:

Neurology
Rehabilitation Medicine
Gerontology

Background:

Stroke (cerebrovascular accident) is a primary cause of global disability.
Survivors frequently experience sensory, cognitive, and motor deficits.
These deficits impair balance, gait, and increase fall risk.

Purpose of the Study:

To explore the connections between stroke impairments and balance/gait control.
To examine the impact of these issues on fall risk and daily activity.
To review effective rehabilitation strategies for post-stroke recovery.

Main Methods:

Literature review and synthesis of existing research on stroke rehabilitation.
Discussion of interrelationships between impairments, balance, gait, and fall risk.
Identification of current and future research directions.

Main Results:

Stroke-related impairments significantly affect balance and walking.
Fear of falling and reduced physical activity are common consequences.
Rehabilitation offers a pathway to improved function and quality of life.

Conclusions:

Effective rehabilitation interventions can enhance balance and walking post-stroke.
Improving mobility leads to greater independence and life quality.
Further research is needed to optimize post-stroke rehabilitation strategies.