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Topics related to "A case of familial atrioventricular heart block affected by alteration of the"

arrhythmia arrhythmia
arrhythmia , disturbance in the rate or rhythm of the heartbeat. Various arrhythmias can be symptoms of serious heart disorders; however, they are usually of no medical significance except in the presence of additional symptoms. The heart's rhythm is controlled by an electrical impulse that is... Read more
Ischemia Ischemia
Ischemia Definition Ischemia is an insufficient supply of oxygenated blood to an organ, usually due to a blocked artery. Description Myocardial ischemia is an intermediate condition in coronary artery disease during which the heart tissue is slowly or suddenly starved of oxygen and other... Read more
Heart block Heart block
heart block is an abnormal delay or, in extreme cases, complete block in the conduction of the electrical impulse from the atria to the ventricles (A-V block) or in the specialized conducting network supplying the ventricles (bundle block).Gerbezius, an early eighteenth-century German physician,... Read more
Atrioventricular node Atrioventricular node
atrioventricular node (AVN) A specialized group of cardiac muscle fibres situated in the fibrous ring between the right atrium and ventricle of the heart. The AVN is the only pathway between the atria and the ventricles through which electrical impulses can pass. Thus, following the contraction of... Read more
Myocardial diseases Myocardial diseases
Cardiomyopathy Definition Cardiomyopathy is a chronic disease of the heart muscle (myocardium), in which the muscle is abnormally enlarged, thickened, and/or stiffened. The weakened heart muscle loses the ability to pump blood effectively, resulting in irregular heartbeats (arrhythmias ) and... Read more
Sinoatrial node Sinoatrial node
sinoatrial node (SA node) (sy-noh-ay-tri-ăl) n. the pacemaker of the heart: a microscopic area of specialized cardiac muscle located in the upper wall of the right atrium near the entry of the vena cava. Fibres of the SA node contract at around 70 times per minute. Following each contraction,... Read more
Heart Failure Heart Failure
Heart Failure Definition Heart failure is a condition in which the heart has lost the ability to pump enough blood to the body's tissues. With too little blood being delivered, the organs and other tissues do not receive enough oxygen and nutrients to function properly. Description According to... Read more
Myocarditis Myocarditis
Myocarditis Definition Myocarditis is an inflammatory disease of the heart muscle (myocardium) that can result from a variety of causes. While most cases are produced by a viral infection, an inflammation of the heart muscle may also be instigated by toxins, drugs, and hypersensitive immune... Read more
infarction infarction
infarction blockage of blood circulation to a localized area or organ of the body resulting in tissue death. Infarctions commonly occur in the spleen , kidney, lungs , brain , and heart . The acute emergency known as myocardial infarction or heart attack is usually caused by a blockage in... Read more
Mitral valve Mitral valve
bicuspid valve (left atrioventricular valve; mitral valve) A valve, consisting of two flaps, situated between the left atrium and the left ventricle of the heart of birds and mammals. When the left ventricle contracts, forcing blood into the aorta, the bicuspid valve closes the aperture to the left... Read more

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