Nikolas
Created page with "In '''left bundle branch block''' (LBBB) a block in the left bundle branch causes the left ventricle to depolarise later than the right. This causes certain characteristic ECG features. == Etiology == See bundle branch block. == Clinical features == The characteristic ECG features include: * Wide QRS (> 120 ms) * Wide and notched R wave in leads I, aVL, V5, V6 (forming an “M” shape) * Absent Q waves in leads I, aVL, V5, V6 * Deep (somet..."