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3 days ago · 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...
5 days ago · The heart is a muscular pumping organ located medial to the lungs along the body's midline in the thoracic region. The bottom tip of the heart, known as its apex, is turned to the left, so that about 2/3 of the heart is located on the body's left side with the other 1/3 on right.
5 days ago · Research shows cardiac patients want to understand heart events, adopt heart-healthy diets, manage medications, recognize symptoms, control risk factors and engage in cardiac rehabilitation programs.
4 days ago · In adults, a normal heart rate is between 60 and 100 bpm (normocardic), whereas it is higher in children. A heart rate below normal is called " bradycardia " (<60 in adults) and above normal is called " tachycardia " (>100 in adults).
6 days ago · If normal heart rhythm is not restored, it can lead to death. Ventricular fibrillation is most found in those with underlying heart disease or those who have experienced trauma. Ventricular tachycardia is also due to defective electrical pulses in the heart's lower ventricles. It is usually harmless for people with healthy hearts, but it can be ...
6 days ago · Murphy next directed the 2014 television film adaptation of Larry Kramer's Broadway play The Normal Heart. Murphy then collaborated with The Normal Heart executive producer Jason Blum to produce a metasequel to the cult-classic horror film The Town That Dreaded Sundown.
3 days ago · For adults, a normal rate typically falls between 60 to 100 beats per minute (bpm). However, individual variations are common, and factors such as your age, gender, fitness level, and overall health can all influence your specific resting heart rate.
