PPT-AVRT Atrial ventricular Reentrant tachycardia

Jazmine Boloor PATIENT IN AVRT EKG DELTA WAVE SA node triggers sends signal to AV node and accessory pathway AV node has a safeguard to slow the signal down so the ventricles can fill Accessory pathway doesnt have safeguard meaning the signal can very quickly travel from the atria down depolarizing the ventricles This creates a slurred upstroke as the P wave is closely coupled with the QRS Once the signal gets through the AV node it travels very quickly through the circuit of the heart and up the accessory pathway creating a sharp downwards wave as the ventricles depolarize . The LAA is a normal part of the heart anatomy and causes no problems in the general population However this pouch is a major source of blood clots in patients with atrial fibrillation Atrial fibrillation AF is the biggest risk factor for blood clots Arrhythmias. Objectives. Describe the normal conduction in the heart. Describe pathophysiology of . bradycardias. Describe pathophysiology of . tachycardias. Describe treatment of the above. Case. A 55 year old male calls 911 because his “heart is racing.” He initially is alert, oriented, and has mild shortness of breath. On physical exam, he has a regular tachycardia at 180, and monitor shows a regular, narrow-complex tachycardia. He denies chest pain. Midway through transport, he becomes less responsive, and his blood pressure drops as he starts sweating profusely.. or…. “. slow down, you move too fast. ”. Susan P. Torrey, M.D., FACEP, FAAEM. Associate Professor of Emergency Medicine. Tufts University School of Medicine. Baystate. Medical Center, Springfield, Mass. tachyarrhythmias. د. حسين محمد جمعة . اختصاصي الامراض الباطنة . البورد العربي . كلية طب الموصل . 2010. Key points: diagnosis. Rhythm refers to the regularity . or spacing . of the ECG waves. Any variation from the . normal rhythm . and sequence of excitation of the heart is termed . an arrhythmia.. Or simply. Abnormal rhythm of heart is called arrhythmia.. Dr. Jehad Rababah. Cardiac Conduction System. Automaticity. Excitability. Conductivity. Contractility . Properties of Cardiac Cells. 3. ECG Strip. Reflects the electrical activity in the heart. Small (0.05sec) & large (0.2sec) boxes . Cardiac Muscle Contraction. Depolarization of the heart is rhythmic and spontaneous. About 1% of cardiac cells have automaticity— (are self-excitable). Gap junctions ensure the heart contracts as a unit. Review of Cardiac Electrophysiology. . Automaticity. Excitability. Conductivity. Contractility. Cardiac Conduction System. Cardiac Conduction System. . (Cont’d). . Sinoatrial node:. . Electrical impulses at 60 to 100 beats/min. Mostafa Hekmat. Cardiologist. Electrophysiologist. VENTRICULAR TACHYCARDIA. VT Arises Distal To The Bifurcation Of The HB . In The Specialized Conduction System. In The Ventricular Muscle. Or In Combination Of Both Tissues. A . CASE SERIES AND REVIEW OF THE LITERATURE . 1. Lily . K. . Fatula. , BS; . 1,2. William . D. Bolton, MD; . 1,2. Barry . R. Davis, MD; . 1,2. James . E. Stephenson, MD; . 1,2. Sharon . Ben-Or, MD. . VENTRICULAR . TACHYCARDIA. Ventricular tachycardia can be caused by disorders of . impulse formation . (enhanced automaticity or triggered activity) and . conduction. (reentry. ). . In . general, the specific type, prognosis, and management of VT depend on the presence of . AVN. Impulse conduction. Impulses originate regularly at a frequency of . 60-100 beat/ min. -100. -80. -60. -40. -20. 0. 20. Phase 0. Phase 1. Phase 2. Phase 3 . Phase 4. Na. +. ca. ++. ATPase. . mv. . .. Four structures. are key to the conduction of electrical impulses through the heart muscle. :. The . sinoatrial (SA) node. located in the right atrium . . •. The atrioventricular (AV) node. Odesa National Medical University. Department of internal medicine 1. with course of cardio-vascular pathology. ARRHYTHMIA. Definition of Arrhythmia:. The . Origin, Rate, Rhythm, Conduct velocity and sequence.