Advanced Clinical Skill I Test #1 (EKG) Questions with 100% Correct Answers

What are the three types of cells in the heart? Correct Answer 1. Pacemaker Cells 2. Electrical Conduction Cells 3. Myocardial Cells What is the Mean Vector through the heart? Correct Answer Vector of electrical flow that move and to the left in the heart - where positive electricity flows If a vector from two electrodes flows closer to this vector if will have a more positive reading What is the flow of electricity through the heart? Correct Answer SA Node - AV Node - Bundle of His - Left and Right Bundle Branches - Purkinje Fibers What is the PR Segment? Correct Answer Flat segment that may exist between the end of the P wave and before the Q wave - also represents the baseline What does the P wave represent? Correct Answer Depolarization of the Atria What does the T wave represent? Correct Answer Repolarization of the ventricles What does the QRS complex represent? Correct Answer Depolarization of the right and left ventricles Know that the Repolarization of the Atria is hidden in the QRS complex What is an Artifact? Correct Answer Electrical interference - someone moving, leads on hairy areas, leads moving, etc. What are the V1-V6 leads? Correct Answer Leads on the chest - why the R wave gets more positive (peak gets larger) going right to left V1: 4th right intercostal space (ICS) V2: 4th left ICS V3: Midway between V2 and V4 V4: 5th left ICS in MCL V5: 5th left ICS in anterior axillary line V6: 5th left ICS in mid-axillary line