Cardiac muscle
hideCardiac muscle is a type of involuntary striated muscle found in the walls of the heart, specifically the myocardium. Cardiac muscle cells are known as cardiac myocytes (or cardiomyocytes). Cardiac muscle is one of three major types of muscle, the others being skeletal and smooth muscle. The cells that comprise cardiac muscle are sometimes seen as intermediate between these two other types in terms of appearance, structure, metabolism, excitation-coupling and mechanism of contraction. Cardiac muscle shares similarities with skeletal muscle with regard to its striated appearance and contraction, with both differing significantly from smooth muscle cells.
Coordinated contraction of cardiac muscle cells in the heart propel blood from the atria and ventricles to the blood vessels of the circulatory system. Cardiac muscle cells, like all tissues in the body, rely on an ample blood supply to deliver oxygen and nutrients and to remove waste products such as carbon dioxide. The coronary arteries fulfill this function.
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News tagged with heart muscle
New genetic cause of cardiac failure discovered
Nov 25, 2009 |
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Over the course of a lifetime, the heart pumps some 250 million liters of blood through the body. In the order to do this, the muscle fibers of the heart have to be extremely durable. The research group headed by Dr. Wolfgang ...
Your own stem cells can treat heart disease
Nov 17, 2009 |
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The largest national stem cell study for heart disease showed the first evidence that transplanting a potent form of adult stem cells into the heart muscle of subjects with severe angina results in less pain and an improved ...
Carvedilol shown to have unique characteristics among beta blockers
Medicine & Health / Medications
Nov 20, 2009 |
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In a new study, researchers report that a class of heart medications called beta-blockers can have a helpful, or harmful, effect on the heart, depending on their molecular activity.
Abnormal cholesterol levels may raise risk of heart failure
Nov 23, 2009 |
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(PhysOrg.com) -- Even if you never have a heart attack, abnormal blood cholesterol levels may significantly raise your risk of heart failure, according to research reported in Circulation: Journal of the American Heart As ...
Scientists grow mice heart muscle strip that beats
Oct 15, 2009 |
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(PhysOrg.com) -- Scientists have grown a piece of heart muscle - and then watched it beat - by using stem cells from a mouse embryo, a big step toward one day repairing damage from heart attacks.
Drug for erectile dysfunction improves heart function in young heart-disease patients
Nov 18, 2009 |
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Heart function significantly improved in children and young adults with single-ventricle congenital heart disease who have had the Fontan operation following treatment with sildenafil, a drug used to treat erectile dysfunction ...
Protein changes in heart strengthen link between Alzheimer's disease and chronic heart failure
Nov 16, 2009 |
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A team of U.S., Canadian and Italian scientists led by researchers at Johns Hopkins report evidence from studies in animals and humans supporting a link between Alzheimer's disease and chronic heart failure, two of the 10 ...
An often overlooked protein actually a potent regulator of cardiac hypertrophy
Nov 16, 2009 |
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A protein long thought to be a secondary regulator in the heart's response to stressors like hypertension actually appears to be a primary regulator according to researchers from the Center for Translational Medicine at Thomas ...
New strategy for mending broken hearts?
Oct 11, 2009 |
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(PhysOrg.com) -- By mimicking the way embryonic stem cells develop into heart muscle in a lab, Duke University bioengineers believe they have taken an important first step toward growing a living "heart patch" ...
Major improvements made in engineering heart repair patches from stem cells (w/ Video)
Oct 07, 2009 |
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University of Washington (UW) researchers have succeeded in engineering human tissue patches free of some problems that have stymied stem-cell repair for damaged hearts.
Viagra relatives may shrink abnormally large hearts
Sep 24, 2009 |
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Compounds related to Viagra, which is already in clinical trials to prevent heart failure, may also counter the disease in a different way, according to a study published online today in the journal Circulation Research. The re ...
Finding Better Ways to Diagnose Heart Attacks
Sep 25, 2009 |
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(PhysOrg.com) -- UA biochemistry researchers apply Nobel Prize technology to develop better diagnostics for heart attacks. Their work also could help predict individual risks of heart disease.
Heart attacks: The tipping point
Apr 27, 2009 |
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Twenty percent of American deaths each year are caused by heart attack or angina, sometimes without any warning.
Human cardiac master stem cells identified
Jul 01, 2009 |
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(PhysOrg.com) -- Harvard Stem Cell Institute researchers at Massachusetts General Hospital have identified the earliest master human heart stem cell from human embryonic stem cells - ISL1+ progenitors - that ...
Stem cells not the only way to fix a broken heart
Jul 23, 2009 |
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Researchers appear to have a new way to fix a broken heart. They have devised a method to coax heart muscle cells into reentering the cell cycle, allowing the differentiated adult cells to divide and regenerate healthy heart ...
