countershock

fibrillation

[fi″brĭ-la´shun] 1. a small, local, involuntary, muscular contraction, due to spontaneous activation of single muscle cells or muscle fibers.2. the quality of being made up of fibrils.3. the initial degenerative changes in osteoarthritis, marked by softening of the articular cartilage and development of vertical clefts between groups of cartilage cells.

Fibrillation on an electrocardiographic tracing. From Fenstermacher and Hudson, 1995.atrial fibrillation a reentrant cardiac arrhythmia marked by rapid randomized contractions of the atrial myocardium, causing a totally irregular rapid atrial rate. It is recognizable on an electrocardiogram by the absence of P waves and an irregular ventricular response. It may be controlled by drug therapy or cardioversion.ventricular fibrillation a cardiac arrhythmia marked by fibrillary contractions of the ventricular muscle due to rapid repetitive excitation of myocardial fibers with ineffectual ventricular contraction; on the surface electrocardiogram it is characterized by lack of identifiable QRS complexes. This is a frequent cause of cardiac arrest. An apparatus called a defibrillator is used to alleviate it by delivering an electric shock to the heart muscle; this depolarizes the myocardium and ends the irregular contractions so that the heart can resume normal, regular contractions.

count·er·shock

(kown'ter-shok), An electric shock applied to the heart to terminate a disturbance of its rhythm.

count·er·shock

(kown'tĕr-shok) An electric shock applied to the heart to terminate a disturbance of its rhythm.

单词	countershock
释义	countershock Translations EncyclopediaSeefibrillation countershock fibrillation [fi″brĭ-la´shun] 1. a small, local, involuntary, muscular contraction, due to spontaneous activation of single muscle cells or muscle fibers.2. the quality of being made up of fibrils.3. the initial degenerative changes in osteoarthritis, marked by softening of the articular cartilage and development of vertical clefts between groups of cartilage cells.Fibrillation on an electrocardiographic tracing. From Fenstermacher and Hudson, 1995.atrial fibrillation a reentrant cardiac arrhythmia marked by rapid randomized contractions of the atrial myocardium, causing a totally irregular rapid atrial rate. It is recognizable on an electrocardiogram by the absence of P waves and an irregular ventricular response. It may be controlled by drug therapy or cardioversion.ventricular fibrillation a cardiac arrhythmia marked by fibrillary contractions of the ventricular muscle due to rapid repetitive excitation of myocardial fibers with ineffectual ventricular contraction; on the surface electrocardiogram it is characterized by lack of identifiable QRS complexes. This is a frequent cause of cardiac arrest. An apparatus called a defibrillator is used to alleviate it by delivering an electric shock to the heart muscle; this depolarizes the myocardium and ends the irregular contractions so that the heart can resume normal, regular contractions. count·er·shock (kown'ter-shok), An electric shock applied to the heart to terminate a disturbance of its rhythm. count·er·shock (kown'tĕr-shok) An electric shock applied to the heart to terminate a disturbance of its rhythm.
随便看	spongiose spongiosis spongiositis spongiotic dermatitis spongious spongiozoa spongoblast spongocoel spongoid spongolite spongolith spongologist spongology spongospora subterranea spongy spongy body of penis spongy bone spongy brakes spongy degeneration spongy degeneration of central nervous system spongy degeneration of infancy spongy degeneration of white matter spongy layer spongy layer of endometrium spongy layer of female urethra