PPT-Figure 18.17 Atrial depolarization, initiated

by the SA node causes the P wave P R T Q S SA node AV node With atrial depolarization complete the impulse is delayed at the AV node Ventricular depolarization begins at apex causing the. fibrillation: diagnosis and management. د. حسين محمد جمعة . اختصاصي الامراض الباطنة . البورد العربي . كلية طب الموصل . 2010. Physiology . of the Heart. Mechanism and Events of Contraction. 1) Influx of sodium ions from the extracellular fluid into the cells initiates the action potential by opening voltage-regulated sodium channels . Anna . Ephgrave.  --------------------------------------------------. The webinar slides can be downloaded and printed from:. http://bit.ly/AE-webinar. If you have any questions, please type them in your chat box during the presentation.. 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. Mary N. Healy, MS, ARNP-BC. Heart & Vascular Center of Sarasota. OBJECTIVES. Define the difference between paroxysmal and persistent Atrial Fibrillation. State the CVA risk per year of a 68 . yr. . John Windle MD October 18, 2013. Professor and Chief of Cardiology. University of Nebraska Medical Center. “Ha . ha. . ha. , Biff. Guess what? After we go to the drugstore and the post office, . C. atheter . Ab. lation Versus . An. tiarrhythmic Drug Therapy for . A. trial Fibrillation (CABANA) Trial . Jeanne E. Poole MD, George Johnson BSEE, Kristi H. Monahan RN, Hoss Rostami BSMSE, . Adam Silverstein MS, Hussein Al-Khalidi PhD, Mauri Wilson RN, Yves Rosenberg MD, MPH, . 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. -4. Level. C. Klauser. 1, 2. , T. Bigault. 1. , P. B. ö. ni. 3, 4. , J. Chastagnier. 1. , P. Guimera-Millan. 1. , D. Jullien. 1. , N. Rebrova. 5. , M. Schneider. 4. and T. Soldner. 1. 1. Institut Laue-Langevin, Grenoble, France. x  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. P axis normal (P waves positive in I and . aVF. ). Rate <60 bpm; marked sinus bradycardia (<50 bpm). May be seen in normal adults, particularly athletes, and . in elderly individuals Increased . Stands for electrocardiogram . ( . EKG ); it’s a record of the . heart’s . electrical activity. .. . This activity recorded in a form of waves , . each wave . has its own characteristic . Electrical activity means the depolarization and repolarization of the myocardium . Freedom . from atrial fibrillation at 12 . months: 63. % of the mitral valve surgery plus ablation group . vs. . 29% of the mitral valve surgery alone group (p < . 0.001). Among . the ablation group, freedom from atrial fibrillation occurred in 61% with PVI vs. 66% with .