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[DOC File]Pathological Conditions: The Heart and Blood Vessels
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2- Conduction Heart block: It is caused by abnormality of impulse conduction in the AV node. The causes of block are: Ischemia of the A-V node by coronary insufficiency. Compression of the A-V node by scar tissue or by calcification. Inflammation of the A-V node, such as occur in rheumatic fever.
conduction block rhythm

Heart block - Wikipedia
Heart block or atrioventricular block: * Failure of proper conduction of impulses through the AV node to the . Bundle of His. Damage to SA node can cause impulses to be too weak to activate AV node which means that impulses fail to reach ventricles. If failure occurs only occasionally causing heart to miss beat at regular intervals – partial ...
conduction block nerve

[DOC File]6- Cardiac Arrhythmia
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Left bundle branch block (LBBB) is a form of intraventricular conduction abnormality, where there is a failure of conduction through the left bundle branch. Because the left bundle branch of the conducting system is subdivided into anterior and posterior fascicles, LBBB can be considered a form of bifascicular block.
electrical conduction through heart

[DOC File]LBBB - developinganaesthesia
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• The intrinsic conduction system of the heart initiates depolarization impulses. • Action potentials spread throughout the heart, causing coordinated heart contraction. • An ECG wave tracing records the electrical activity of the heart. ** Now is a good time to go to quiz questions 3 and 4:
hearts conduction system in order

[DOC File]Intrinsic Conduction System
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Mobitz type II is almost always permanent and pathological, and frequently progresses to complete heart block. Pathophysiology. In contrast to Mobitz type I AV block, Mobitz type II AV block almost always results from conduction system disease infranodally, i.e. below the level of the AV node, either at the bundle of His or in the bundle branches.
heart conduction system diagram

Conduction heart block