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Related Concept Videos

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 I:Effect of Heart Rate on Cardiac Output01:19

Cardiac Output I:Effect of Heart Rate on Cardiac Output

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Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart...
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Pulse01:05

Pulse

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The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls...
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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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Physiology of the Heart: The Cardiac Cycle01:18

Physiology of the Heart: The Cardiac Cycle

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The cardiac cycle describes the events from one heartbeat to the next. It includes three main phases: diastole, atrial systole, and ventricular systole, all driven by changes in chamber pressures and the function of heart valves.
Diastole: The Relaxation Phase
During diastole, all four heart chambers relax. The atrioventricular (AV) valves open, and the semilunar valves close. This phase sees the lowest chamber pressures, promoting ventricular filling. Venous blood enters the heart through the...
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Exercise and Cardiac Output01:17

Exercise and Cardiac Output

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Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be...
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Related Experiment Video

Updated: Mar 31, 2026

Author Spotlight: Assessment of Cardiac Output Calculation by Thermodilution in Pigs for Effective Perfusion Flow During EVLP
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Author Spotlight: Assessment of Cardiac Output Calculation by Thermodilution in Pigs for Effective Perfusion Flow During EVLP

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[Measuring Method of Cardiac Output and Its Progress].

Xiaoyuan Yan, Shumei Gao, Yilin Song

    Sheng Wu Yi Xue Gong Cheng Xue Za Zhi = Journal of Biomedical Engineering = Shengwu Yixue Gongchengxue Zazhi
    |October 22, 2015
    PubMed
    Summary

    Cardiac output measurement is vital for cardiovascular disease diagnosis and treatment. This paper reviews recent advancements in non-invasive cardiac output detection technologies and analyzes various methods.

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    Area of Science:

    • Cardiology
    • Biomedical Engineering
    • Medical Instrumentation

    Background:

    • Cardiac output is a critical indicator for diagnosing and treating cardiovascular diseases.
    • Timely assessment of cardiac output reflects the cardiovascular system's status.
    • Accurate cardiac output monitoring guides effective disease management.

    Purpose of the Study:

    • To review the principles behind non-invasive cardiac output detection methods.
    • To discuss recent technological developments in non-invasive cardiac output monitoring.
    • To analyze and compare various non-invasive cardiac output detection techniques.

    Main Methods:

    • Review of scientific literature on non-invasive cardiac output detection.
    • Analysis of the underlying principles of different non-invasive techniques.
    • Comparative assessment of existing non-invasive cardiac output measurement methods.

    Main Results:

    • Overview of the principles governing non-invasive cardiac output detection.
    • Summary of recent technological innovations in the field.
    • Analysis of the strengths and limitations of various non-invasive methods.

    Conclusions:

    • Non-invasive methods for cardiac output detection are gaining significant attention.
    • Advancements in technology are improving the accuracy and accessibility of cardiac output monitoring.
    • Further analysis and development of these methods are crucial for clinical applications.