Heart - Wikipedia Cardiac muscle tissue has autorhythmicity, the unique ability to initiate a cardiac action potential at a fixed rate—spreading the impulse rapidly from cell to cell to trigger the contraction of the entire heart
Heart | Structure, Function, Diagram, Anatomy, Facts | Britannica heart, organ that serves as a pump to circulate the blood It may be a straight tube, as in spiders and annelid worms, or a somewhat more elaborate structure with one or more receiving chambers (atria) and a main pumping chamber (ventricle), as in mollusks
How the Heart Works - What the Heart Looks Like | NHLBI, NIH Your heart is in the center of your chest, near your lungs It has four hollow chambers surrounded by muscle and other heart tissue The chambers are separated by heart valves, which make sure that the blood keeps flowing in the right direction Read more about heart valves and how they help blood flow through the heart Anatomy of the interior of the heart This image shows the four chambers
Heart disease - Symptoms and causes - Mayo Clinic Coronary artery disease is a common heart condition that affects the major blood vessels that supply the heart muscle A buildup of fats, cholesterol and other substances in and on the artery walls usually causes coronary artery disease This buildup is called plaque
Cardiovascular system: Function, organs, conditions, and more The cardiac cycle consists of two phases: systole (contraction) and diastole (relaxation) Some conditions that can affect the heart include heart attack, stroke, heart failure, and arrhythmia
American Heart Association | To be a relentless force for a world of . . . Help us create a healthier world free of heart disease and stroke Since the American Heart Association’s founding in 1924, deaths from cardiovascular diseases have been cut in half And yet, there are still so many lives to be saved
CardioCare: Premier Cardiovascular Center in Maryland We prioritize patient safety while providing comprehensive cardiac care services Our experienced cardiologists offer a wide variety of treatments, from preventive measures to specialized cardiac interventions