منابع مشابه
Second-degree atrioventricular block.
1) While it is possible only one type of second-degree AV block exists electrophysiologically, the available data do not justify such a conclusion and it would seem more appropriate to remain a "splitter," and advocate separation and definition of multiple mechanisms, than to be a "lumper," and embrace a unitary concept. 2) The clinical classification of type I and type II AV block, based on pr...
متن کاملSecond-degree AV block.
Second-degree AV block includes a variety of conduction patterns of variable prognostic significance. Careful analysis of the pattern of PR and R-R intervals, the QRS axis and duration, as well as the presence or absence of structural heart disease should allow the medical director to assess the applicant's risk for life insurance.
متن کاملElectrophysiologic studies on Mobitz type II second-degree heart block.
SUMMARY Experimental studies were carried out in animals with intracellular and extracellular electrodes used to record simultanieously from the atrium, atrioventricular (A-V) node, bundle of His, bundle branches, Purkinje fibers, and ventricles to deteimine the site of conduction delay and block in Mobitz type II second-degree heart block. Type II block with block occurring within the His-Purk...
متن کاملSecond-degree heart block associated with envenomation by Vipera berus.
Evenomation by the common European adder (Vipera berus) is well known for its significant morbidity but low mortality. Cardiac complications tend to take second place to the systemic upset and usually only comprise non-specific ECG changes. This case illustrates many of the classical features of adder bite but it is also the first account of heart block as a complication.
متن کاملSecond Degree Heart Block Associated with QT Prolongation
Pseudo 2:1 AV block when sinus intervals are shorter than the ventricular refractory period has been reported with long QT syndrome (LQTS). We report the characteristics and treatment of a patient suffering from congenital LQTS with episodes of true 2:1 AV block. The pseudo 2:1 AV block relates to the extreme prolongation of ventricular refractoriness. Several histologic studies have documented...
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ژورنال
عنوان ژورنال: BMJ
سال: 1977
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.2.6082.309