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  2. Heart - Wikipedia

    en.wikipedia.org/wiki/Heart

    The heart is a muscular organ found in humans and other animals. This organ pumps blood through the blood vessels. [1] Heart and blood vessels together make the circulatory system. [2] The pumped blood carries oxygen and nutrients to the tissue, while carrying metabolic waste such as carbon dioxide to the lungs. [3]

  3. Cardiac physiology - Wikipedia

    en.wikipedia.org/wiki/Cardiac_physiology

    Cardiac physiology or heart function is the study of healthy, unimpaired function of the heart: involving blood flow; myocardium structure; the electrical conduction system of the heart; the cardiac cycle and cardiac output and how these interact and depend on one another.

  4. Circulatory system - Wikipedia

    en.wikipedia.org/wiki/Circulatory_system

    The right heart pumps deoxygenated blood to the lungs in the pulmonary circulation. In the human heart there is one atrium and one ventricle for each circulation, and with both a systemic and a pulmonary circulation there are four chambers in total: left atrium, left ventricle, right atrium and right ventricle. The right atrium is the upper ...

  5. What Is Heart Disease? Everything You Need to Know - AOL

    www.aol.com/heart-disease-everything-know...

    Heart surgery may be performed during a heart attack or if other treatment methods don’t work. Some surgeries, like coronary artery bypass grafting, which reroutes blood flow, are major and ...

  6. Are you neglecting your 'second heart'? 1 step to ... - AOL

    www.aol.com/news/neglecting-second-heart-1-step...

    How to activate the ‘second heart’ with 1 step Just walk — take a walking break as often as you can, but at least once or twice an hour, both experts say. “It’s to get that calf muscle ...

  7. Cardiac conduction system - Wikipedia

    en.wikipedia.org/wiki/Cardiac_conduction_system

    A slow heart rate of 60 or less beats per minute is defined as bradycardia. A fast heart rate of more than 100 beats per minute is defined as tachycardia. An arrhythmia is defined as one that is not physiological such as the lowered heart rate that a trained athlete may naturally have developed; the resting heart rates may be less than 60 bpm.

  8. The heart-healthy DASH diet works, but isn’t popular. Here’s ...

    www.aol.com/lifestyle/heart-healthy-dash-diet...

    The American Heart Association notes that cutting your sodium intake by even 1,000 milligrams a day can significantly improve heart health. To keep your food flavorful and delicious without heaps ...

  9. Cardiac output - Wikipedia

    en.wikipedia.org/wiki/Cardiac_output

    Major factors influencing cardiac output – heart rate and stroke volume, both of which are variable. [1]In cardiac physiology, cardiac output (CO), also known as heart output and often denoted by the symbols , ˙, or ˙, [2] is the volumetric flow rate of the heart's pumping output: that is, the volume of blood being pumped by a single ventricle of the heart, per unit time (usually measured ...