Is left bundle branch block classified as any of the following types of heart blocks: first, second, or third degree av heart blocks, or sa node exit blocks.? if not, what type of heart block is lbbb?

SA node is the point of initiation of the heartbeat. 1st, 2nd and 3rd degree AV block refers to increasing severity of conduction block at a point further along the conduction system. Left bundle branch block refers to a block of the two left branches further along the conduction system. The system is like a telephone line ending in right and left branches; the left branch splits again.

Left bundle branch block. Usually complete. So something has damaged left bundle. Google and view images. Discuss with Dr.