I have been having a difficult time understanding the differences between the following: Left posterior hemiblock, left anterior hemiblock, left bundle branch block, and right bundle branch blocks.. This is what I have to share, please make any suggestions Left Posterior Hemi Block: incomplete BBB Must have right axis deviation small Q wave in lead III is normal small R wave in lead I QRS Left Anterior Hemiblock - incomplete BBB must have left axis small Q wave in lead I is normal (does not indicate an old MI) lead II QRS has mostly a negative deflection Lead III has a small positive defelected R wave and deep S wave QRS <.12> Left BBB - Complete BBB looks wider QRS > .12 Could it have left axis? little R waves lead V1 V2 ST depression and T wave inversion is normal in V5 V6 The bunnyear look especially in V1, V2 (bunny ears could be present in others) Rigth BBB - Complete BBBB could have left axis Is it possible to have a right axis? QRS > .12 QRS is positive defected, with larger bunny waves in leads V1 V2 (bunny ears could be present in others) ST depression and T wave inversion is normal in RBB in leads V1 V2 My questions are..... Do hemiblocks contain bunny ears? What are the possibilities with complete R BBB and axis deviation... I have found literature on right BBB could have a left axis.... what about a right axis? What are the possibilities for a complete L BBB and axis deviation (right vs left....) If anyone could help me I would appreciate it!