Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The muscular tissue of the heart.

from The Century Dictionary.

  • noun The muscular substance of the heart.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Anat.) The main substance of the muscular wall of the heart inclosed between the epicardium and endocardium.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun anatomy, cardiology The middle of the three layers forming the wall of the heart.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the middle muscular layer of the heart wall

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin : myo– + Greek kardiā, heart; see kerd- in Indo-European roots.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

New Latin, from Ancient Greek μῦς (mys, "muscle") + καρδία (kardiā, "heart").

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Examples

  • Indeed, although heart can stand some degree of hypoxia, this situation is incompatible with its normal bioenergetic function, and ischemic heart disease with compromised oxygen supply to the myocardium is a common cause of heart failure This idea is clearly illustrated in the present study by the concomitant severe decrease in contractile activity and PCr concentration measured in Control hearts perfused under low oxygen conditions compared with previously reported values

    PLoS ONE Alerts: New Articles Guillaume Calmettes et al. 2010

  • It also protects skin from wrinkles and black spots and prevents such geriatric diseases as cerebral haemorrhage, myocardium and brain infarction by removing acid effete matters in time.

    North Korea Hails New ‘Anti-Ageing Super Drink’ | Impact Lab 2010

  • A cardiomyopathy is a disease of the heart muscle (myocardium).

    Cardiomyopathy 2010

  • The secondary toxicity of TCE, and perhaps the most life-threatening, is its ability to sensitize the myocardium to catecholamines.

    poison prevention for Delaware, Lehigh Valley, S.E. Pennsylvania 2010

  • The potential for CNS depression, respiratory depression, and the ability of this agent to sensitize the myocardium to the arrhythmogenic effects of catecholamines are the major toxicities of TCE poisoning.

    poison prevention for Delaware, Lehigh Valley, S.E. Pennsylvania 2010

  • The heart is almost entirely muscle, the myocardium, and is strong enough to lift approximately 3,000 pounds, close to the weight of a compact car.

    Beverley Golden: How Well Do You Know Your Heart? Beverley Golden 2011

  • Subsequent studies have shown that the cause of death appears to be ventricular fibrillation due to direct sensitization of the myocardium to endogenous circulating catecholamines.

    Freon Abuse 2010

  • Since I have coronary artery disease with some loss of myocardium, I'd have less safety margin if this drug were prescribed.

    Candidates Lay Out Ideas On Health Care In Vegas 2009

  • Straight down between the third and fourth ribs, piercing the myocardium.

    Neurosurgical Intervention For Beginners 2009

  • He had died from a single knife wound between the third and fourth ribs, which had penetrated his myocardium.

    Neurosurgical Intervention For Beginners 2009

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