Medical Education: Atrial and Ventricular Fibrillation
Author C. Sanders. Published on May 21, 2011 - 3:27 am (3820 views — 196 words
, also known as "A fib", occurs when the normal rhythmic contractions of the atria are replaced by rapid irregular twitching of the muscular heart wall. This condition causes an irregular and quivering action of the atria. The term fibrillation
means a fast, uncontrolled heart beat.
Paroxysmal atrial tachycardia
-dee-ah), also known as PAT
, is an episode that begins and ends abruptly during which there are very rapid and regular heartbeats that originate in the atrium. PAT is caused by an abnormality in the bodys electrical system. Paroxysmal
means pertaining to sudden occurrence. Compare with ventricular tachycardia
-shun), also known as "V fib", is the rapid, irregular, and useless contractions of the ventricles. Instead of pumping strongly, the heart muscle quivers ineffectively. This condition is the cause of many sudden cardiac deaths.
, also known as "V tach", a very rapid heart beat that begins within the ventricles. This condition is potentially fatal because the heart is beating so rapidly that it is unable to adequately pump blood through the body. For some patients, this condition can be controlled with an implantable cardioverter defibrillator. Compare with paroxysmal atrial tachycardia