“What are Key Differences Between Right Bundle Branch Blocks and Left Bundle Branch Blocks?”

7.6.24 Quick Review #169 - #surgery #surgeon #doctorgallagher #oralsurgery #oralsurgeon #omfs #dentist #dentistry #dental #anesthesia #rbbb #lbbb #ekg #cardiology Right Bundle Branch Block (RBBB): Definition: RBBB occurs when there’s a delay or blockage in the electrical impulses that travel through the right bundle branch of the heart’s conduction system. EKG Findings: • QRS Duration: Prolonged (>120 ms). • V1-V2 Leads (Right Precordial Leads): RSR’ pattern (rabbit ears). • I, aVL, V5-V6 Leads (Left Lateral Leads): Broad S waves. Clinical Significance: • RBBB can be benign or associated with other heart conditions like pulmonary embolism, myocardial infarction, or chronic lung disease. • It is not typically life-threatening by itself. Left Bundle Branch Block (LBBB): Definition: LBBB occurs when there’s a delay or blockage in the electrical impulses that travel through the left bundle branch. EKG Findings: • QRS Duration: Prolonged (>120 ms). • V5-V6 Leads (Left Lateral Leads): Broad, notched (M-shaped) R waves. • V1-V2 Leads (Right Precordial Leads): Deep S waves. • ST Segment and T Wave: Discordant changes (ST segment and T wave deflections opposite to the QRS complex). Clinical Significance: • LBBB is often associated with underlying heart disease like hypertensive heart disease, coronary artery disease, cardiomyopathy, and can indicate a higher risk of adverse cardiovascular events. • It may be life-threatening if associated with other serious heart conditions. Characteristic Findings: RBBB: • QRS complex duration >120 ms. • RSR’ pattern in V1-V2 (right precordial leads). • Slurred S waves in leads I, aVL, V5-V6. LBBB: • QRS complex duration >120 ms. • Broad, notched R waves in V5-V6. • Deep S waves in V1-V2. • Discordant ST-T changes. References: 1. Wikipedia contributors. (2024, April). Bundle branch block. Wikipedia, The Free Encyclopedia. Retrieved July 6, 2024. 2. Lilly, L. S. (2016). Pathophysiology of Heart Disease: A Collaborative Project of Medical Students and Faculty (6th ed.). Lippincott Williams & Wilkins. 3. Surawicz, B., & Knilans, T. K. (2008). Chou’s Electrocardiography in Clinical Practice: Adult and Pediatric (6th ed.). Saunders. 4. ChatGPT. 2024. #podcast #podcasts #dentalpodcast #dentalpodcasts #doctorgallagherpodcast #doctorgallagherspodcast #doctor #dentistry #oralsurgery #dental #viral #dentalschool #dentalstudent #omfs #surgeon #doctorlife #dentistlife #residency #oralsurgeon #dentist #doctorgallagher