Innervation of the heart: An invisible grid within a black box

Suraj Kapa1, Christopher V DeSimone1, Samuel J Asirvatham2

  • 1Division of Cardiovascular Diseases, Department of Medicine, Mayo Clinic College of Medicine, Rochester, MN.

Insights

This review explains the autonomic nervous system's role in cardiovascular regulation. Understanding cardiac innervation is key to developing new therapies for cardiovascular diseases.

Area of Science:

  • Cardiovascular Physiology
  • Neuroscience
  • Autonomic Nervous System Research

Background:

  • Autonomic control of cardiovascular function involves intricate interactions between central, peripheral, and cardiac elements.
  • This complex interplay governs normal cardiovascular responses to physiological and pathological stressors, including blood pressure, cardiac contractility, and arrhythmias.

Purpose of the Study:

  • To elucidate the anatomic and physiologic features of cardiac innervation.
  • To understand how central, peripheral, and cardiac components contribute to cardiovascular dysregulation in disease.
  • To explore therapeutic strategies targeting these components for cardiovascular diseases.

Main Methods:

  • Review of existing literature on cardiac innervation.
  • Analysis of the roles of central, peripheral, and cardiac autonomic components.
  • Synthesis of information on disease-related dysregulation and therapeutic modulation.

Main Results:

  • Detailed description of the central, peripheral, and cardiac innervation of the heart.
  • Identification of how each component can become dysregulated in various cardiovascular diseases.
  • Exploration of potential therapeutic avenues through modulation of cardiac autonomic pathways.

Conclusions:

  • A comprehensive understanding of cardiac innervation is essential for developing novel therapies for cardiovascular diseases.
  • Targeting specific components of the autonomic nervous system offers promising therapeutic strategies.
  • Further research into autonomic modulation could revolutionize cardiovascular disease treatment.

Related Concept Videos

Regulation of Heart Rates01:31

Regulation of Heart Rates

The regulation of heart rate is a complex process controlled by the autonomic nervous system (ANS), hormonal influences, and intrinsic cardiac mechanisms. The ANS has two main components: the sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS).
The SNS increases heart rate through the release of norepinephrine and epinephrine, which act on beta-1 adrenergic receptors in the heart. This action increases the rate of depolarization in the sinoatrial (SA) node, the heart's...
5.0K
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...
15.5K
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:...
5.5K
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...
10.4K
Anatomy of the Heart01:27

Anatomy of the Heart

The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.
123.8K
Anatomy of the Heart01:20

Anatomy of the Heart

The heart is a hollow, muscular organ approximately the size of a fist, consisting of four chambers. It is enclosed in the pericardium, a fibrous sac with two layers: the visceral and parietal pericardium, separated by a fluid-filled space containing serous fluid to reduce friction.
The heart has three layers: the innermost endocardium, the muscular myocardium, and the outer epicardium, all working together for optimal cardiac function.
Chambers of the Heart
The heart is made up of four...
5.1K