MD Exam 2 { CLEAR IMAGES INCLUDED} Test Questions With Revised Correct Answers Guarantee Pass

MD Exam 2 { CLEAR IMAGES INCLUDED} Test Questions With Revised Correct Answers Guarantee Pass What cardiac event is represented by the P wave? How long is this process (in seconds)? Atrial depolarization; 0.08-0.11 seconds or less than 3 little boxes a) In what lead(s) do P waves normally appear POSITIVE? b) In what lead(s) do P waves normally appear NEGATIVE? a) Positive in I, II, aVF, III, and V4-V6 b) Negative in aVR (that's where impulse is traveling FROM) When an electrical impulse originates in an area other than the original pacemaker, what might we see on an EKG? Premature Atrial Contraction (PAC) What is most likely going to be in your differential based on the abnormal morphology in the rhythm strip shown here? Wandering Atrial Pacemaker (WAP) True or false: PACs are usually non-compensatory True; a non-compensatory pause occurs when the sinus node is depolarized and then reset, so succeeding beats do not fall back in sync