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The heart is a muscular organ situated in the mediastinum.It consists of four chambers, four valves, two main arteries (the coronary arteries), and the conduction system. The left and right sides of the heart have different functions: the right side receives de-oxygenated blood through the superior and inferior venae cavae and pumps blood to the lungs through the pulmonary artery, and the left ...
[50] The adult resting heart rate ranges from 60 to 100 bpm. The resting heart rate of a newborn can be 129 beats per minute (bpm) and this gradually decreases until maturity. [51] An athlete's heart rate can be lower than 60 bpm. During exercise the rate can be 150 bpm with maximum rates reaching from 200 to 220 bpm. [7]
The American Heart Association states the normal resting adult human heart rate is 60–100 bpm. An ultra-trained athlete would have a resting heart rate of 37–38 bpm. [ 3] Tachycardia is a high heart rate, defined as above 100 bpm at rest. [ 4] Bradycardia is a low heart rate, defined as below 60 bpm at rest.
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Footnotes / references. [1] Raycom Media, Inc.was an American televisionbroadcastingcompany based in Montgomery, Alabama. Raycom owned and/or provided services for 65 television stations and two radio stations across 44 markets in 20 states. Raycom, through its Community Newspaper Holdingssubsidiary, also owned multiple newspapers in small and ...
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In the blood supply of the heart, the right coronary artery ( RCA) is an artery originating above the right cusp of the aortic valve, at the right aortic sinus in the heart. [ 1][ 2] It travels down the right coronary sulcus, towards the crux of the heart. [ 1][ 3] It gives off many branches, including the sinoatrial nodal artery, right ...
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