ventricular flutter


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flutter

 [flut´er]
a rapid vibration or pulsation.
atrial flutter a cardiac arrhythmia in which the atrial contractions are rapid (230–380 per minute), but regular. Two types, I and II, are distinguished according to rate; Type I is also more amenable to cardioversion. In Type I the atrial rate is usually 290 to 310 per minute but can range from 230 to 350. In Type II the atrial rate is usually 360 to 380 per minute but can range from 340 to 430.
diaphragmatic flutter peculiar wavelike fibrillations of the diaphragm of unknown cause.
impure flutter atrial flutter in which the atrial rhythm is irregular.
mediastinal flutter see mediastinal flutter.
pure flutter atrial flutter in which the atrial rhythm is regular.
ventricular flutter a possible transition stage between ventricular tachycardia and ventricular fibrillation, the electrocardiogram showing rapid, uniform, and virtually regular oscillations, 250 or more per minute.

ven·tric·u·lar flut·ter

a form of rapid ventricular tachycardia in which the electrocardiographic complexes assume a regular undulating pattern without distinct QRS and T waves.

flutter

Cardiology A family of cardiac tachyarrhythmias characterized by rapid regular atrial–250-350/min or ventricular–200/min rhythms. See Atrial flutter, Ventricular flutter. Cf Fibrillation.
Flutter types
Atrial flutter occurs at 200-350 beats/min (with a 2:1 block, so that the ventricle fires at ± 150 beats/min); AF results from a circus pathway, occurs in atrial dilatation, primary myocardial disease, or rheumatic heart disease and responds poorly to antiarrhythmics
Ventricular flutter is characterized by a continuous and regular depolarization rate of greater than 200 beats/min, and demonstrates high-amplitude zigzag pattern on the EKG, without clear definition of the QRS and T waves, a pattern that may revert spontaneously to a normal sinus rhythm or progress to ventricular fibrillation

ven·tric·u·lar flut·ter

(ven-trik'yū-lăr flŭt'ĕr)
A form of rapid ventricular tachycardia in which the electrocardiographic complexes assume a regular undulating pattern without distinct QRS and T waves.
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