![]() ![]() (2.65 mb)Ĭomplete Heart Block (3rd Degree Block) Top Questions Asked On This Page Please allow several seconds for the video to load. Atropine should not be relied upon and in the case of myocardial ischemia it should be avoided.īelow is a short video which will help you quickly identify second-degree heart block type 2 on a monitor. Second-degree AV block (Type 2) is clinically significant because this rhythm can rapidly progress to complete heart block.Ītropine may be attempted if immediate TCP is not available or time is needed to initiate TCP. Second-degree AV block (Type 2) should be treated with immediate transcutaneous pacing or transvenous pacing because there is risk that electrical impulses will not be able to reach the ventricles and produce ventricular contraction. Autoimmune diseases affecting the heart.Myocardial infarction that damages the conduction system.Causes of the structural damage to the conduction system include the following: Causes: Second-degree heart block type 2 is usually caused by structural damage to the conduction system of the heart. This slowing of conduction appears as a wide QRS complex on the ECG. The QRS on an ECG will most likely be wide because the block occurs in the His bundle or bundle branches and conduction through the ventricles is slowed. ![]()
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