Trinity University School of Medicine. Society of Medicine and Surgery St. Vincent & the Grenadines. November 28th, 2011 Andrei Q. Núñez, MD.

 Review the basic concepts of normal cardiac anatomy and electrophysiology.  Establish the functional correlations of ECG signals and traces with the mechanical cardiac events.  Understand components and proper application of the technology used in ECG.  Learn about the up-to-date AHA guidelines and recommendations for a successful and accurate execution of ECG tracing.  Provide Trinity students with a simple method to evaluate ECG and identify abnormal traces effectively in various clinical settings.

I. Cardiac Electrical System 1.Anatomy 2.Electrophysiology II. ECG Principles. 1.Signals & Vectors 2.Leads. 3.Machine 4.Waves 5.Paper. 6.Execution. III. TRACING EXERCISE # 1 IV. TRACING EXERCISE # 2 1.AHA Considerations 2.Technical Factors 3.Operator Dependent Factors V. ECG Clinical Utility 1.Arrhythmia Identification 2.Cardiac Arrest Management 3.Acute Coronary Syndromes VI. Interpretation Keypoints. 1.Rhythm 2.Cardiac Axis 3.Heart Rate 4.Pattern 5.Origin 6.Auricular Activity 7.AV Conduction 8.Ventricular Activity

 Excitable Tissue.  AP:  Depolarization (phase 4) vs. Conduction (phase 0)  Pacemakers. (Intrinsic rates)  SA N: bpm *Vagal tone  60 – 100 bpm  AV N: 40 – 60 bpm  PS: 30 – 40 bpm  Myocardium Electrical Coupling.