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Ventricular Tachycardia Ventricular Tachycardia
Ventricular Tachycardia Definition Ventricular tachycardia (V-tach) is a rapid heart beat that originates in one of the lower chambers (the ventricles) of the heart. To be classified as tachycardia, the heart rate is usually at least 100 beats per minute. Description A rapid heart rate can... Read more
Ventricular Fibrillation Ventricular Fibrillation
Ventricular Fibrillation Definition Ventricular fibrillation is a very rapid, uncoordinated, ineffective series of contractions throughout the lower chambers of the heart. Unless stopped, these chaotic impulses are fatal. Description When the ventricles begin to quiver and do not employ... Read more
tachycardia tachycardia
tachycardia (tak-i-kar-diă) n. an increase in the heart rate above normal. sinus t. tachycardia that may occur normally with exercise or excitement. It may also be due to illness, such as fever. supraventricular t. (SVT) tachycardia usually due to an accessory conduction pathway between the... Read more
Ventricular Shunt Ventricular Shunt
Ventricular shunt Definition A ventricular shunt is a tube that is surgically placed in one of the fluid-filled chambers inside the brain (ventricles). The fluid around the brain and the spinal column is called cerebrospinal fluid (CSF). When infection or disease causes an... Read more
Ventricular Assist Device Ventricular Assist Device
Ventricular assist device Definition A ventricular assist device (VAD) is a battery-operated mechanical system consisting of a blood pump and a control unit used for temporary support of blood circulation. The VAD decreases the workload of the heart while maintaining... Read more
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
natriuretic peptide natriuretic peptide
natriuretic peptide n. any of several peptides that stimulate diuresis and vasodilatation. They act on the kidney tubules to promote excretion of sodium (natriuresis) and water. atrial n. p. (ANP) a peptide produced in the atria of the heart in response to a rise in atrial pressure. brain n. p.... Read more
fibrillation fibrillation
fibrillation (fy-bril-ay-shŏn) n. chaotic electrical and mechanical activity of a heart chamber, which results in loss of synchronous contraction. The affected part of the heart then ceases to pump blood. atrial f. (AF) a common type of arrhythmia that results in a rapid and irregular pulse... Read more
Tetralogy of Fallot Tetralogy of Fallot
Tetralogy of Fallot Definition Tetralogy of Fallot is a common syndrome of congenital heart defects. Description The heart is two pumps in one. The ventricle on the left side pumps blood full of oxygen through the body; the ventricle on the right side pumps the same blood... Read more
Heart valve replacement Heart valve replacement
Mitral valve replacement Definition Mitral valve replacement is a surgical procedure in which the diseased mitral valve of the heart is replaced by a mechanical or biological tissue valve. Purpose The mitral valve can become diseased, preventing it from adequately controlling the direction of the... Read more

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