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Hace 2 días · Heart, organ that serves as a pump to circulate the blood. It may be as simple as a straight tube, as in spiders and annelid worms, or as complex as the four-chambered double pump that is the center of the circulatory system in humans, other mammals, and birds.
- The Editors of Encyclopaedia Britannica
- In humans, the heart is situated between the two lungs and slightly to the left of center, behind the breastbone. It rests on the diaphragm, the mu...
- The heart consists of several layers of a tough muscular wall, the myocardium. A thin layer of tissue, the pericardium, covers the outside, and ano...
- The pumping of the heart, or the heartbeat, is caused by alternating contractions and relaxations of the myocardium. These contractions are stimula...
- The rhythmic noises accompanying the heartbeat are called heart sounds. The two distinct sounds are heard, a low, slightly prolonged “lub” (first s...
Hace 12 horas · Un nuevo estudio en ‘Heart Rhythm’, la revista oficial de la Heart Rhythm Society, la Cardiac Electrophysiology Society y la Pediatric & Congenital Electrophysiology Society, publicado por ...
Hace 4 días · The World Heart Federation is the voice of the global cardiovascular community. Our Members are our strength and our priority is to build strong health systems so that everyone has access to prevention and care.
Hace 1 día · Questions What is the risk of major clinical outcomes in patients with rheumatic heart disease (RHD) and what are the risk predictors in endemic countries? Findings In this prospective observational study including 13 696 patients enrolled from 24 low- and middle-income countries, nearly 15% of patients died at 3 years, mostly due to heart failure or sudden death.
Hace 3 días · The heart is a muscle that squeezes blood and functions like a pump. The heart's systems can be classified as either electrical or mechanical, and both of these systems are susceptible to failure or dysfunction.
Hace 2 días · METHODS: Using the 2015 to March 2020 National Health and Nutrition Examination Survey and 2015 to 2019 Medical Expenditure Panel Survey, we estimated trends in prevalence for cardiovascular risk factors based on adverse levels of Life’s Essential 8 and clinical cardiovascular disease and stroke.
Hace 5 días · The heart beats about 2.5 billion times over the average lifetime, pushing millions of gallons of blood to every part of the body. This steady flow carries with it oxygen, fuel, hormones, other compounds, and a host of essential cells.
- hhp_info@health.harvard.edu
