myocardium

middle layer of the heart wall, which consists of cardiac muscle

AI overview

The myocardium is the thick, muscular middle layer of your heart wall that does the actual work of pumping blood throughout your body. It matters because without healthy myocardial muscle tissue, your heart cannot contract effectively to circulate oxygen-rich blood to your organs and tissues.

AI-generated from the Wikipedia summary — may contain errors.

Research

261,690 papers

The stunned and hibernating myocardium: a brief review.ReviewClinical cardiology · 1991Conti CRDOI: 10.1002/clc.4960140903
[The hibernating myocardium].ReviewTidsskrift for den Norske laegeforening : tidsskrift for praktisk medicin, ny raekke · 1995Kirkebøen KA
Structural changes in myocardium during acute ischemia.ReviewCirculation research · 1974Jennings RB, Ganote CE
Characterization of hibernating and stunned myocardium.ReviewEuropean heart journal · 1997Heusch G, Schulz RDOI: 10.1093/eurheartj/18.suppl_d.102
[Myocardium metabolism].Schweizerische medizinische Wochenschrift · 1958HEGGLIN R, LUTHY E
Improved tagged cardiac MRI myocardium strain analysis by leveraging cine segmentation.Computer methods and programs in biomedicine · 2020Paknezhad M, Brown MS, Marchesseau SDOI: 10.1016/j.cmpb.2019.105128
[The myocardium in patients with ischemic heart disease].ReviewKardiologiia · 1993Vorob'ev LP, Maev IV, V'iuchnova ES
[Structure and function of the myocardium from a biochemical aspect].ReviewKokyu to junkan. Respiration & circulation · 1985Katagiri T, Konno N, Yanagishita T et al.

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Wikidata facts

Image: 2004 Heart Wall.jpg

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Commons category: Myocardium
NCI Thesaurus ID: C12371

Sources (6)

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Article

Cardiac muscle (also called heart muscle or myocardium) is one of three types of vertebrate muscle tissues, the others being skeletal muscle and smooth muscle. It is an involuntary, striated muscle that constitutes the main tissue of the wall of the heart. The cardiac muscle (myocardium) forms a thick middle layer between the outer layer of the heart wall (the pericardium) and the inner layer (the endocardium), with blood supplied via the coronary circulation. It is composed of individual cardiac muscle cells joined by intercalated discs, and encased by collagen fibers and other substances that form the extracellular matrix.

Cardiac muscle contracts in a similar manner to skeletal muscle, although with some important differences. Electrical stimulation in the form of a cardiac action potential triggers the release of calcium from the cell's internal calcium store, the sarcoplasmic reticulum. The rise in calcium causes the cell's myofilaments to slide past each other in a process called excitation-contraction coupling.