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Related Concept Videos

Pulse01:05

Pulse

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 between...
Cardiac Output and Stroke Volume01:11

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 output averages...
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

Cardiac Output I:Effect of Heart Rate on Cardiac Output

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 rate...
Exercise and Cardiac Output01:17

Exercise and Cardiac Output

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 met...
Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

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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Intracardiac Pressures Measured Using an Implantable Hemodynamic Monitor: Relationship to Mortality in Patients With Chronic Heart Failure.

Circulation. Heart failure·2017
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Prediction of All-Cause Mortality Based on the Direct Measurement of Intrathoracic Impedance.

Circulation. Heart failure·2015
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Estimation of cardiac output in patients with congestive heart failure by analysis of right ventricular pressure waveforms.

Biomedical engineering online·2011
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Hemodynamic factors associated with acute decompensated heart failure: part 2--use in automated detection.

Journal of cardiac failure·2011
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Hemodynamic factors associated with acute decompensated heart failure: part 1--insights into pathophysiology.

Journal of cardiac failure·2011
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Chronic ambulatory intracardiac pressures and future heart failure events.

Circulation. Heart failure·2010

Related Experiment Video

Updated: Jul 20, 2026

Invasive Hemodynamic Assessment for the Right Ventricular System and Hypoxia-Induced Pulmonary Arterial Hypertension in Mice
04:54

Invasive Hemodynamic Assessment for the Right Ventricular System and Hypoxia-Induced Pulmonary Arterial Hypertension in Mice

Published on: October 24, 2019

A right ventricular pressure waveform based pulse contour cardiac output algorithm in canines.

Mustafa Karamanoglu1, Tom D Bennett

  • 1Heart Failure Management, Medtronic Inc, 7000 Central Ave NE, CW320, Fridley, MN 55432, USA. mustafa.karamanoglu@Medtronic.com

Cardiovascular Engineering (Dordrecht, Netherlands)
|September 9, 2006
PubMed
Summary

A new algorithm using right ventricular pressure estimates cardiac output (CO) accurately, even during critical hemodynamic changes. This method offers a reliable way to track CO in various heart conditions.

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Biventricular Assessment of Cardiac Function and Pressure-Volume Loops by Closed-Chest Catheterization in Mice
08:21

Biventricular Assessment of Cardiac Function and Pressure-Volume Loops by Closed-Chest Catheterization in Mice

Published on: June 15, 2020

Related Experiment Videos

Last Updated: Jul 20, 2026

Invasive Hemodynamic Assessment for the Right Ventricular System and Hypoxia-Induced Pulmonary Arterial Hypertension in Mice
04:54

Invasive Hemodynamic Assessment for the Right Ventricular System and Hypoxia-Induced Pulmonary Arterial Hypertension in Mice

Published on: October 24, 2019

Biventricular Assessment of Cardiac Function and Pressure-Volume Loops by Closed-Chest Catheterization in Mice
08:21

Biventricular Assessment of Cardiac Function and Pressure-Volume Loops by Closed-Chest Catheterization in Mice

Published on: June 15, 2020

Area of Science:

  • Cardiovascular Physiology
  • Biomedical Engineering
  • Hemodynamic Monitoring

Background:

  • Accurate tracking of cardiac output (CO) is vital for managing cardiac diseases.
  • Existing arterial pressure-based CO algorithms struggle with altered systemic hemodynamics.

Purpose of the Study:

  • To develop and validate a novel right ventricular pressure waveform-based pulse contour CO algorithm.
  • To assess the algorithm's performance during diverse hemodynamic perturbations.

Main Methods:

  • Developed a CO algorithm estimating pulmonary artery flow waveform parameters from right ventricular pressure.
  • Validated the algorithm against gold standard measurements in canines undergoing induced changes in preload, afterload, and contractility.

Main Results:

  • The algorithm accurately predicted CO changes (r2 = 0.82) across a wide range (-45% to +31%).
  • Pulmonary artery impedance parameters remained stable, unlike significantly altered ascending aortic parameters during perturbations.
  • Right ventricular pressure-based CO estimation proved robust despite left ventricular hemodynamic shifts.

Conclusions:

  • Right ventricular pressure waveform analysis provides a feasible method for CO estimation.
  • This approach maintains accuracy during acute alterations in systemic and cardiac hemodynamics.
  • Offers a potential advancement in hemodynamic monitoring for critical care and cardiac diagnostics.