title: [Allorhythmias (classification and differential diagnosis)].
abstract: Allorhythmia in the broad sense is defined as a regular sequence of similar groups of ECG-complexes associated with various disorders of cardiac rhythm and conduction. The following classification of allorhythmias is suggested. A. True allorhythmias. I. Due to extrasystoles: 1) noncomplicated; 2) complicated by disorders of conduction. II. Allorrhythmias due to ectopic rhythms with capture beats: 1) paroxysmal or nonparoxysmal ectopic tachycardia; 2) escaping rhythms. III. Allorrhythmias due to impulse conduction block: 1) II degree S--A block; 2) II degree A--V-block; 2, atrial flutter and atrial tachycardia with A--V-block 3 : 2, 4 : 2, etc. B. Pseudoallorrhythmias due to regular alterations in the shape of the QRS complex: 1) transient bundle-branch block; 2) transient WPW syndrome; 3) bidirectional tachycardia. Differential diagnosis of various types of allorrhythmia is of great importance in choosing the measures and methods for antiarrhythmic therapy.
mesh_terms: D002037:Bundle-Branch Block / Q000175:diagnosis; D005117:Cardiac Complexes, Premature / Q000145:classification / Q000175:diagnosis; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D013610:Tachycardia / Q000175:diagnosis; D009626:Terminology as Topic; D014927:Wolff-Parkinson-White Syndrome / Q000175:diagnosis
vernacular_title: Alloritmii (klassifikatsiia i differentsial'naia diagnostika).