Heart
hideThe heart is a muscular organ in all vertebrates responsible for pumping blood through the blood vessels by repeated, rhythmic contractions, or a similar structure in annelids, mollusks, and arthropods. The term cardiac (as in cardiology) means "related to the heart" and comes from the Greek καρδιά, kardia, for "heart."
The heart of a vertebrate is composed of cardiac muscle, an involuntary striated muscle tissue which is found only within this organ. The average human heart, beating at 72 beats per minute, will beat approximately 2.5 billion times during a lifetime (about 66 years). It weighs on average 250 g to 300 g in females and 300 g to 350 g in males.
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News tagged with heart
Poll: Many parents, high-priority adults who tried to get H1N1 vaccine unable to get it
Nov 06, 2009 |
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(PhysOrg.com) -- A new national poll from Harvard School of Public Health (HSPH) researchers found that a majority of adults who tried to get the H1N1 vaccine for themselves or their children have been unable ...
Kidney function decline increases risk of heart failure and premature death
Nov 05, 2009 |
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Declining kidney function is linked to a higher risk of heart failure, heart attack, peripheral arterial disease, and early death in individuals with or without kidney disease, according to a pair of studies appearing in ...
Old method of heart bypass better than 'off-pump'
Nov 04, 2009 |
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(AP) -- It seemed like a great idea - doing bypass surgery while the heart is still beating, sparing patients the complications that can come from going on a heart-lung machine. Now the first big test of this method has ...
Heart disease effects perceived as more acute by people with PTSD
Medicine & Health / Psychology & Psychiatry
Nov 04, 2009 |
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(PhysOrg.com) -- In a study of 1,022 men and women with heart disease, those with post-traumatic stress disorder perceived the effects of their disease as more burdensome and disabling than did those without PTSD, even when ...
Drug that increases good cholesterol reduces clogging of arteries
Nov 04, 2009 |
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(PhysOrg.com) -- A drug that raises levels of 'good' cholesterol, when taken in addition to standard statin therapy to lower 'bad' cholesterol, can reduce the furring up of arteries in patients with established ...
Study points to new uses, unexpected side effects of already existing drugs
Nov 04, 2009 |
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Scientists at the University of North Carolina at Chapel Hill School of Medicine and the University of California, San Francisco have developed and experimentally tested a technique to predict new target diseases ...
Statins may worsen symptoms in some cardiac patients
Nov 03, 2009 |
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Although statins are widely used to prevent heart attacks, strokes, and other cardiovascular disorders, new research shows that the class of drugs may actually have negative effects on some cardiac patients. A new study presented ...
Catheter-delivered Valve May Help People with Heart Defects Avoid Multiple Surgeries
Nov 02, 2009 |
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(PhysOrg.com) -- Children born with certain heart defects have impaired blood flow from the right ventricle to the pulmonary artery leading to the lungs, requiring implanted devices (known as right-ventricular ...
Cellular Source of Most Common Type of Abnormal Heart Beat Found
Nov 02, 2009 |
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(PhysOrg.com) -- While studying how the heart is formed, scientists at the University of Pennsylvania School of Medicine serendipitously found a novel cellular source of atrial fibrillation (AF), the most ...
Study finds stroke risk from anemia drug Aranesp
Medicine & Health / Medications
Oct 31, 2009 |
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(AP) -- A new study raises fresh safety concerns about widely used anemia medicines, finding that the drug Aranesp nearly doubled the risk of stroke in people with diabetes and chronic kidney problems who are not yet sick ...
Researchers develop innovative imaging system to study sudden cardiac arrest
Oct 30, 2009 |
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A research team at Vanderbilt University has developed an innovative optical system to simultaneously image electrical activity and metabolic properties in the same region of a heart, to study the complex mechanisms that ...
Say yes to a clinical trial; it may be good for your health
Oct 30, 2009 |
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Patients with chronic heart failure who agree to take part in clinical trials have a better prognosis than those who do not, according to a study reported in the November European Journal of Heart Failure.(1) The finding, say th ...
High Blood Pressure Medicines Show Promise for Treating Heart Disease
Medicine & Health / Medications
Oct 29, 2009 |
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(PhysOrg.com) -- Two medications commonly used to treat high blood pressure appear to be effective in treating one of the most common and potentially deadly forms of heart disease, according to a report by ...
Exercise keeps dangerous visceral fat away a year after weight loss (w/ Video)
Oct 29, 2009 |
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A study conducted by exercise physiologists in the University of Alabama at Birmingham (UAB) Department of Human Studies finds that as little as 80 minutes a week of aerobic or resistance training helps not only to prevent ...
Adding ezetimibe to atorvastatin improves lipid control
Oct 27, 2009 |
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Adding ezetimibe to atorvastatin significantly boosted the attainment of lipid targets as specified by both Canadian and European guidelines in elderly patients aged 65 and older and the combination produced superior results ...
