BIOC34H3 Lecture Notes - Lecture 3: Atrial Flutter, Ventricular Fibrillation, Qrs Complex
Document Summary
Ii), the electrical axis of the heart, and the cardiac. 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 such as a blockage of the branch bundles. The two branch bundles (left and right), take the waves of depolarization down from the av node, though the bundle of his, and then down to either side of the heart until they reach the purkinje fibers. So, it is possible for conduction to be slowed in either one of the branches, creating either a right or left branch bundle block. The ecg traces created by this condition are very strange - the lines are saw-tooth, or "m" shaped as one branch bundle depolarises before the other one. A relatively common form of arrhythmia is heart flutter. Flutter and fibrillation can occur in the atria, ventricles or both.
