Blood supply to cardiac conduction system

Blood supply to cardiac conduction system

1. Blood supply to cardiac conduction system

2. Schematic diagram of blood supply to cardiac conduction system. The first septal branch of the left anterior descending (LAD) coronary artery supplies a critical portion of the interventricular conduction system (red oval). AV, atrioventricular; marginal a., marginal artery; PDA, posterior descending artery; RCA, right coronary artery; SA, sinoatrial. Reproduced, with permission, from Harthorne JW, Pohost . GM, Electrical therapy of cardiac dysrhythmias. In Levine, HJ ( ed ) Clinical Cardiovascular Physiology, New York, Grune and Stratton: 1976. pp. 853–882

3. Blood Supply to Bundle of Branches LBBB RBBB Anterosuperior fascicle Posteromedial fascicle Both LAD and RCA 50% By septal branch of LAD and AV node branch of RCA Other 50% by only LAD 50% Only by the AV nodal branch of RCA( Kugel’s artery) Other 50% by AV nodal branches of RCA Septal branches of LAD Both LAD and RCA 50% By septal branch of LAD and AV node branch of RCA Other 50% by only LAD

4. Simplification is the finest art