EKG competency Exam Rated A+

EKG competency Exam Rated A+ What is another term for the SA node - Answer- Natural pacemaker What is another name for the AV node - Answer- Gatekeeper SA Node will generate how many impulses? - Answer- 60-100 BPM Is SA node fails to generate impulse, what hapens? - Answer- AV node takes over - 40 to 60 BMP If the AV node and/or bundle of his fails to generate impulse, what happens? - Answer- Purkinje fibers take over- 20-40 BPM What does the P wave represent? - Answer- Atrial depolarization (atria contract) What does the QRS complex represent? - Answer- Ventricular depolarization (ventricles contract) What does the T-wave represent? - Answer- Ventricular repolarization Where does the atrial repolarize? - Answer- During QRS How many seconds is in 1 small box represent on an EKG paper? - Answer- 0.04 seconds How many seconds is in 1 big box represent on an EKG paper? - Answer- 0.20 seconds Show me the P-wave. How do you know it is normal? - Answer- Normal is upright + rounded, one before QRS measure the PRI. What is the normal PRI? - Answer- 0.12 to 0.20 seconds (3-5 small boxes) Measure the QRS complex. What is the normal QRS complex - Answer- 0.06 to 0.12 seconds (1.5 to 3 small boxes) How do you determine the heart rate? - Answer- Large box method (300 / large boxes between R waves) Placement for V1 - Answer- Fourth intercostal space at right margin of sternum Placement of V2 - Answer- Fourth infercostal space at left margin of sternum Position of V3 - Answer- Midway between V2 and V4 Position of V4 - Answer- Fifth intercostal space at junction of the left midclavicular