Related Experiment Video

Updated: Aug 4, 2026

High-resolution Optical Mapping of the Mouse Sino-atrial Node
11:07

High-resolution Optical Mapping of the Mouse Sino-atrial Node

Published on: December 2, 2016

[Individual and age-related variability of the arteries to the atrioventricular node in the human heart]

G A Spirina

    Morfologiia (Saint Petersburg, Russia)
    |April 1, 1994
    PubMed

    More Related Videos

    Preclinical Cardiac Electrophysiology Assessment by Dual Voltage and Calcium Optical Mapping of Human Organotypic Cardiac Slices09:35

    Preclinical Cardiac Electrophysiology Assessment by Dual Voltage and Calcium Optical Mapping of Human Organotypic Cardiac Slices

    Published on: June 16, 2020

    Pipeline for Multi-Scale Three-Dimensional Anatomic Study of the Human Heart04:22

    Pipeline for Multi-Scale Three-Dimensional Anatomic Study of the Human Heart

    Published on: June 28, 2024

    Related Concept Videos

    The Cardiac Cycle01:13

    The Cardiac Cycle

    The heart beats rhythmically in a sequence called the cardiac cycle—a rapid coordination of contraction (systole) and relaxation (diastole).
    The Process
    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 empty blood into the...
    Electrophysiology of Normal Cardiac Rhythm01:19

    Electrophysiology of Normal Cardiac Rhythm

    The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase of...
    Mechanism of Cardiac Arrhythmias01:28

    Mechanism of Cardiac Arrhythmias

    Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
    Conduction System of the Heart01:19

    Conduction System of the Heart

    Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
    The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
    Development of the Heart01:27

    Development of the Heart

    The development of the human heart, a crucial organ, commences from the mesoderm on the 18th or 19th day after fertilization. This process initiates in the cardiogenic area, a group of mesodermal cells at the embryo's head end, which evolves into elongated strands known as cardiogenic cords. These cords undergo a transformation to form hollow-centered endocardial tubes.
    As the embryo undergoes lateral folding, these paired tubes approach each other, merging into a single primitive heart tube by...
    Conduction System of the Heart01:20

    Conduction System of the Heart

    The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
    This system relies on the unique properties of nodal and Purkinje cells:...