Week 4 Scholarly Questions and Analytical Thinking
What is a wave?
What is a segment?
What is an interval?
What are the components that we measure on a P, Q, R, S, T? Can you draw and label them correctly!
What is the J point.
What is the PR segment?
What are the components that we measure on a P, Q, R, S, T? Make sure you can draw and label them correctly!
CLASS, THIS CONTENT ON THE MEAN QRS IS NOT ON THE FIRST EXAM but will be on the SECOND EXAM. I often wait to introduce this material after Exam 1.
How do you determine the mean QRS? Practice, Practice Practice! What leads do you use? What steps do you follow?
When measuring the QRS axis, where is your actual starting point on the heart to find this Mean Vector? (i.e., SA Node, AV Node, Bundle of His, Bundle branches, Purkinje fibers) (Answer, it is the AV node).
What is the range for a normal QRS axis (from what degrees to what degrees)? What is the range for right axis deviation? What is the range for extreme right axis deviation? What is the range for left axis deviation?
When reporting the mean QRS, how is this correctly done?
Make sure you know your perpendicular leads!
Practice determining the QRS axis.
What do you know about the mean QRS and the Biphasic (or isoelectric lead)?
Do the terms QRS axis and mean QRS say the same thing (YES)? What do we know about the mean QRS and the biphasic lead? Are they parallel to each other, perpendicular to each other, or what?
What leads are perpendicular to each other?
How do you count Cardiac cycles across a tracing?
What are the classification ranges for the axis of the mean QRS? Make sure you know the range and how to classify! What is normal axis? What is left axis deviation? What is right axis deviation? What is extreme right axis deviation? How do you correctly report the mean QRS (also called the QRS axis)?
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