Pathological Conditions: The Heart and Blood Vessels

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. ................
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