first-degree AV block with left bundle branch block (LBBB) and bradycardia in one; and (v) alternating LBBB and right bundle branch block (RBBB) in one patient. The choice of pacemaker implanted ...

Remember that T wave inversions and ST segment depression are normal in leads V1 to V3 in the presence of a right bundle branch block; thus, myocardial ischemia technically cannot be easily ...

If the QRS complex is widened and downwardly deflected in lead V1, a left bundle branch block is present. If the QRS complex is widened and upwardly deflected in lead V1, a right bundle branch ...