<prompt> Answer this question truthfullyWhat does a bundle branch block electrocardiogram mean?  <response>: <reason> Shown below is an EKG of left bundle branch block depicting an RsR pattern M pattern in lead V6, and a wide QRS complex in both leads V1 and V6.Copyleft image obtained courtesy of ECGpedia, Shown below is an EKG with an RsR pattern M pattern in leads V4, V5, and V6 suggesting a left bundle branch block. Also seen are wide QRS complexes throughout the precordium, and ST segment depression in leads II, V5, and V6.Copyleft image obtained courtesy of ECGpedia, Shown below is an EKG with a left axis deviation and an RsR pattern M pattern in all limb leads leads I, II, III, aVR, aVL, and aVF and in lead V6, depicting a left bundle branch block. Tachycardia is also present with a rate of more than 100 beats per minute.Copyleft image obtained courtesy of ECGpedia, Shown below is an EKG with a left axis deviation and an RsR pattern M pattern throughout the precordium, depicting a left bundle branch block. The EKG also shows wide QRS complexes and a prolonged PR interval.Copyleft image obtained courtesy of ECGpedia, ev:youtubeHPLR_lixSpYfeaturerelatedFor more EKG examples of First Degree AV Block click here 