| Week 2 Scholarly Questions and Analytical Thinking Monday and Wednesday Make sure you can explain what is happening during the electrical conduction through the heart and what is showing on the EKG tracing. What causes the delay in conduction at the AV node? What is different from the right bundle branch and the left bundle branch? Practice identifying the Q, R, and S on EKG tracings in your text. Can you identify all of the intervals, segments, waves, complexe and J-point on an EKG tracing? Learn this in your text and on also on the EKG WEB site; we will also review in class—get going on this now. What does the Q represent electrically in the heart? Each view of the heart is an EKG lead. How many views do we typically use? There are 6 limb leads divided into two categories. What are they? Which limb leads are bipolar and which are unipolar? Be able to draw and label Einthoven’s triangle with the correct charges. Be able to draw and label all of the augmented and standard leads. What are the precordial leads? How many are there? Which leads are in the horizontal plane and which leads are in the frontal plane? Class remember, we VIEW the leads in the heart from their positive electrode, and then state whether the depolarization is going toward the electrode or away from it. Which leads would be described as left lateral? Which leads would be described as inferior leads? Be able to draw and label the hexaxial reference system with correct degrees, negative and positive charges, and where the limb leads are located. Add the six limb leads to this drawing and show their positive charge only. What does precordial mean? Who is given credit for first identifying the precordial leads? Make sure you can identify and classify the 'R' wave transtion? Friday Let’s Review: What leads are in the frontal plane? What leads are in the horizontal plane? Examining the precordial leads, V1 and V2 provide electrical information from where on the heart. V3 and V4 provide electrical information from where on the heart? Finally, V5 and V6 provide electrical information from where on the heart? What is ‘R’ wave transition. How do you determine this on a EKG strip. What is a ‘biphasic’ lead? If you have several biphasic leads, how do you know which is the ‘R’ wave transition lead (remember, you must count small boxes above and below baseline to determine)? What are the different classifications for ‘R’ wave transition. How do you state the ‘R’ wave transition? End |
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