Related Experiment Video
Updated: Jul 6, 2026
06:40
Impact of Intracardiac Neurons on Cardiac Electrophysiology and Arrhythmogenesis in an Ex Vivo Langendorff System
Published on: May 22, 2018
Preface: cardiac control pathways: signaling and transport phenomena
1Faculty of Biomedical Engineering, Technion, Isreal Institute of Technology, Haifa, Israel 32000. Sam@bm.technion.ac.il
Annals of the New York Academy of Sciences
|April 1, 2008
Summary
Cellular signaling and transport are vital for cell function and organism health. Disruptions in these processes can lead to disease, necessitating a deeper understanding for therapeutic development.
Area of Science:
- Cell Biology
- Physiology
- Biochemistry
Background:
- Cellular communication governs fundamental functions and coordinates activity through complex signaling pathways.
- Proper cellular function relies on the orchestrated transport of ions and signaling molecules, transmembrane transport, and intracellular responses.
- Cellular perception and response to the microenvironment are crucial for development, tissue repair, immunity, and homeostasis.
Purpose of the Study:
- To highlight key aspects of cellular information transfer and control mechanisms.
- To enhance the understanding of normal and pathophysiological cardiac functions.
- To identify and study basic transport phenomena and physiological signaling pathways for improved therapeutic strategies.
Main Methods:
- Review of cellular transport mechanisms (passive and active physical and chemical).
- Analysis of physiological signaling pathways and their biological consequences.
- Exploration of control mechanisms in cellular information transfer.
Main Results:
- Cellular signaling involves interwoven phenomena including transport, conformational changes, chemical activation, and genetic expression.
- Deviations in signaling or transport pathways are implicated in disease generation and modulation.
- Understanding these processes is key to developing efficient therapeutic modalities.
Conclusions:
- A harmonic orchestration of cellular events and control mechanisms is essential for cell well-being.
- Interference with cellular information transfer underlies various diseases.
- Further study of transport phenomena and signaling pathways can advance cardiac function therapies.
Related Concept Videos
01:29Pathophysiology of Cardiac Performance
Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
01:19Conduction 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...
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...
01:20Conduction 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:...
This system relies on the unique properties of nodal and Purkinje cells:...
01:19Electrophysiology 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...
01:30Cardiac Action Potential
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.
Ionic Basis of Cardiac 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.
Ionic Basis of Cardiac Action Potentials
01:17Pathophysiology of Heart Failure
Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...