BIOC34H3 Lecture Notes - Lecture 3: Ventricular Fibrillation, Qrs Complex, Heart Block
Document Summary
Ii), the electrical axis of the heart, and the cardiac. See lecture 2 notes for pre-mature beats: heart block and branch bundle block. The previous lecture concluded with examples of three different types of heart block (types i, ii and ii). There are other possible blockages of electrical activity in the heart. For example, branch bundles too can be blocked. So, it is possible for conduction to be slowed in either one of the branches, creating either a right or left branch bundle block. Ecg traces created by this condition are very strange - the lines are saw-tooth, or "m" shaped. One of the consequences of a branch bundle block is that the ventricles will no longer contract simultaneously; instead, the ventricle that has the block on its side will contract slightly after the ventricle that does not. A relatively common form of arrhythmia is heart flutter; fibrillation is less common but more serious.
