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Related Concept Videos

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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Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

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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.
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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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The Cardiac Cycle01:13

The Cardiac Cycle

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The heart beats rhythmically in a sequence called the cardiac cycle—a rapid coordination of contraction (systole) and relaxation (diastole).
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Electrical signals—sent from the sinoatrial (SA) node in the right atrial wall to the atrioventricular (AV) node between the right atrium and right ventricle—cause both atria to simultaneously contract. When the signal reaches the AV node, it pauses for approximately a tenth of a second, allowing the atria to contract and...
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Cardiac Cycle01:29

Cardiac Cycle

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The cardiac cycle refers to the sequence of events that occur in the heart from the beginning of one heartbeat to the next. It's characterized by alternating periods of contraction (systole) and relaxation (diastole) of the heart muscles.
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Cardiac Action Potential01:30

Cardiac Action Potential

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Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
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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.
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Related Experiment Video

Updated: Feb 16, 2026

Isolation and Profiling of Human Primary Mesenteric Arterial Endothelial Cells at the Transcriptome Level
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Cardiac Endothelial Cell Transcriptome.

Achim Lother1, Stella Bergemann2, Lisa Deng2

  • 1From the Institute of Experimental and Clinical Pharmacology and Toxicology, Faculty of Medicine (A.L., S.B., L.D., L.H.), Heart Center Freiburg University, Department of Cardiology and Angiology I, Faculty of Medicine (A.L., M.M., C.B.), and BIOSS Centre for Biological Signaling Studies (L.H.), University of Freiburg, Germany. achim.lother@universitaets-herzzentrum.de.

Arteriosclerosis, Thrombosis, and Vascular Biology
|January 6, 2018
PubMed
Summary
This summary is machine-generated.

Cardiac endothelial cells (ECs) have a unique gene expression profile, distinct from other organ ECs. This study identifies key genes and transcriptional regulators, offering new targets for cardiac research.

Keywords:
endothelial cellsfluorescencehearttranscription factortranscriptome

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Area of Science:

  • Cardiovascular Biology
  • Molecular Biology
  • Genomics

Background:

  • Endothelial cells (ECs) display significant heterogeneity across different organs and vascular beds.
  • Cardiac ECs play a crucial role in heart function and disease but remain incompletely understood.
  • Characterizing cardiac ECs is essential for advancing cardiovascular research.

Purpose of the Study:

  • To comprehensively analyze the transcriptome of cardiac ECs.
  • To identify genes and regulatory mechanisms specific to cardiac ECs.
  • To compare cardiac EC gene expression with ECs from other organs.

Main Methods:

  • Isolation of pure ECs from adult mouse hearts using fluorescence-assisted cell sorting.
  • RNA sequencing (RNAseq) to determine gene expression profiles.
  • Bioinformatic analysis to identify enriched genes and transcription factor binding motifs.

Main Results:

  • RNAseq identified 1288 genes predominantly expressed in cardiac ECs.
  • Several transcription factors were identified as potential regulators of the cardiac EC transcriptome.
  • Cardiac ECs show distinct gene expression patterns compared to renal, cerebral, and pulmonary ECs.
  • The Meox2/Tcf15, Fabp4, and Cd36 signaling cascade, involved in fatty acid metabolism and atherosclerosis, is highly expressed in cardiac ECs.

Conclusions:

  • This study provides a valuable resource for understanding cardiac EC gene expression and regulation.
  • The cardiac EC transcriptome is significantly different from other cardiac cell types and ECs from other organs.
  • New candidate genes for cardiac EC research have been identified, offering potential targets for future investigation.