cardiac muscle

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Related to Cardiac myocytes: cardiac hypertrophy, Cardiomyocytes

car·di·ac mus·cle

the involuntary muscle comprising the myocardium and walls of the pulmonary veins and superior vena cava, consisting of anastomosing transversely striated muscle fibers formed of cells united at intercalated discs; the one or two nuclei of each cell are centrally located and the longitudinally arranged myofibrils have considerable sarcoplasm around them; connective tissue is limited to reticular and fine collagenous fibers; contraction is rhythmic and intrinsically stimulated.
Synonym(s): muscle of heart
Farlex Partner Medical Dictionary © Farlex 2012

cardiac muscle

n.
The specialized striated muscle tissue of the heart; the myocardium.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

car·di·ac mus·cle

(kahr'dē-ak mŭs'ĕl)
The muscle forming the myocardium, consisting of anastomosing transversely striated muscle fibers formed of cells united at intercalated discs.
Synonym(s): muscle of heart.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
Cardiac muscleclick for a larger image
Fig. 91 Cardiac muscle . The intercalated discs enable the rapid transmission of excitatory waves across the tissue.

cardiac muscle

a type of vertebrate muscle found only in the HEART, which appears to be halfway between INVOLUNTARY MUSCLE and STRIATED MUSCLE in that its fibres are striated, but contain a single nucleus (see Fig. 91 ). The action of cardiac fibres is to produce strong and rhythmic contractions from within, even when removed from the body (see MYOGENIC CONTRACTION). Unlike striated muscle, cardiac muscle does not become fatigued even though it is repeatedly stimulated. The heartbeat is controlled by the AUTONOMIC NERVOUS SYSTEM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Expression of p27 was repressed by microRNA-24 in hypertrophic cardiac tissue and Neonatal rat cardiac myocytes
Activation of distinct cAMP-dependent and cGMPdependent pathways by nitric oxide in cardiac myocytes. Circ Res 1999; 84: 1020-31.
The severe histopathological abnormalities observed in the cardiac myocytes procured from ISPH-treated group-II rats could be because of disturbed antioxidant homeostasis and disrupted membrane architecture caused by ISPH-induced oxidative stress, free-radical mediated LPO and excessive intracellular acidification.
Haematopoietic stem cells do not transdifferentiate into cardiac myocytes in myocardial infarcts.
Sadoshima, "The Akt-glycogen synthase kinase 3[beta] pathway regulates transcription of atrial natriuretic factor induced by [beta]-adrenergic receptor stimulation in cardiac myocytes," Journal of Biological Chemistry, vol.
Chen et al., "Cardiac myocyte apoptosis is associated with increased DNA damage and decreased survival in murine models of obesity," Circulation Research, vol.
Song et al., "Regulation of L-type calcium channel by phospholemman in cardiac myocytes," Journal of Molecular and Cellular Cardiology, vol.
Our results also showed that the beneficial effects of WXKL and KN93 might be attributed to the shortening of [APD.sub.90] and regulation of the CaMK II signal transduction pathway, thus eventually improving cardiac electrical remodeling and tissue remodeling in hypertrophic cardiac myocytes.
Altogether, our findings suggest that Cur therapy results in significant down-modulation of (Tc + ET-l)-triggered BNP and [PGE.sub.2] synthesis in cardiac myocytes that contributes to prevent [PGE.sub.2]/EP4-dependent induction of BNP in untreated and uninfected myocardial cells.
Sheep are preferred in acute myocardial infarction (AMI) and heart failure studies due to the resemblance between sheep and human cardiac myocytes.18
Vitamin D receptors have been identified in several extrarenal organ systems including cardiac myocytes and endothelial cells [7].