Bundle Branch Block | Dr. Kalim Salloum

{Chapters:} 00:00:00 - Introduction and Poetry — Opening the lecture with a poem by Mahmoud Darwish and its connection to the siege of the branches. 00:02:31 - Basic Anatomy of the Conducting System — Sinus node, bundle of His, and right and left branches. 00:03:56 - Anatomical differences between branches and their clinical significance. 00:10:25 - Normal Sinus Rhythm — NSR vs SR. 00:12:35 - PR segment — a silent area on the surface of the ECG. 00:15:05 - Normal Ventricular Depolarization — Septal & Freewall Activation and the phases of a normal QRS complex. 00:19:00 - R-wave progression & Normal QRS Axis. 00:20:40 - Intraventricular Conductivity Disorders (IVCD) - Types and how they manifest on ECG. 00:22:57 - Complete vs. Incomplete Block. 00:25:55 - STT Secondary Abnormalities — Appropriate Discordance. 00:31:08 - Right Bundle Branch Block (RBBB) — Causes, Morphology, and ECG Presentation. 00:35:27 - Interpreting Increased Voltage in the Context of IVCD. 00:38:08 - Configuration on V1 and V6 — RSR's pattern & Slurred S & Slurred R. 00:41:13 - ST-T abnormalities in RBBB. 00:43:25 - Cardiac Axis in the Context of RBBB — Why Does Isolated RBBB Not Distort the Axis? 00:49:48 - Left Bundle Branch Block (LBBB) — Important Causes and its Association with Serious Heart Diseases 00:57:30 - Ventricular Depolarization in the Context of LBBB and Septal Activation Inversion 01:01:38 - Configuration on V1 and V6 with LBBB — QS Lonely Wave and Monophasic R 01:09:33 - Interpretation of Q on the Left Stroke in the Context of LBBB 01:13:55 - Appearance of Monophasic R + Slurred S on the Left Stroke 01:15:53 ​​- Conditions for the Appearance of Monophasic R on the Left Stroke in the Context of LBBB 01:17:29 - ST Elevation with LBBB — When is it Benign and When Does it Indicate Myocardial Infarction? 01:21:54 - QRS Axis in LBBB 01:24:42 - Left Anterior Fascicular Block (LAFB) & Left Posterior Fascicular Block (LPFB). 01:30:52 - Bifascicular Block — RBBB + LAFB/LPFB. 01:34:22 - Trifascicular Block — PR Prolongation & Risk of Complete Heart Block. 01:47:10 - Clinical Signs & Symptoms of BBB. 01:49:02 - LBBB vs LVH. 01:50:02 - STEMI Equivalent + Sgarbossa Criteria. 01:55:06 - Conclusion and return to Darwish's poem — "Besiege your siege and strike your enemy."