Genetics

APOE variants' effect on mortality studied in 38,000

A new study of 38,537 persons of European ancestry suggests that a rare variation of a gene called APOE may be protective and prolong life, in sharp contrast to a more widely studied APOE variant that increases risk of death.

Cardiology

New stem cell combination could help to repair damaged hearts

A combination of heart cells derived from human stem cells could be the answer to developing a desperately-needed treatment for heart failure, according to new research part-funded by the British Heart Foundation (BHF) and ...

Cardiology

3-D printing the human heart

A team of researchers from Carnegie Mellon University has published a paper in Science that details a new technique allowing anyone to 3-D bioprint tissue scaffolds out of collagen, the major structural protein in the human ...

Medical research

Five animals that could help us beat human diseases

As humans, we may feel rather lucky about our evolutionary lot. We live longer than many other animals, and lifespans continue to increase thanks to better diets, advances in medicine and improved public health. But our quest ...

Medical research

Carbohydrate in the heart seems to help regulate blood pressure

New research suggests that a particular type of carbohydrate plays an important role in regulating the blood pressure in the human body. This has been shown by researchers from the University of Copenhagen and Rigshospitalet ...

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Human heart

The human heart provides a continuous blood circulation through the cardiac cycle and is one of the most vital organs in the human body. It is divided into four chambers: the two upper chambers are called the left and right atria and two lower chambers are called the right and left ventricles. Normally the right ventricle pumps the same blood amount into the lungs with each bit that the left ventricle pumps out. Physicians commonly refer to the right atrium and right ventricle together as the right heart and to the left atrium and ventricle as the left heart.

The electric energy that stimulates the heart occurs in the sinoatrial node, which produces a definite potential and then discharges, sending an impulse across the atria. The Purkinje fibers transmit the electric charge to the myocardium while the cells of the atrial walls transmit it from cell to cell, making the atrial syncytium.

The human heart and its disorders (cardiopathies) are studied primarily by cardiology.

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