Basic Arrhythmias Exam Questions with Complete Answers Latest Update
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Basic arrhythmias
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Basic Arrhythmias
Basic Arrhythmias Exam Questions with Complete Answers Latest Update
What is the primary pacemaker site of the heart and its intrinsic rate - Answers SA node 60-100
What are the two escape pacemaker sites and their intrinsic rates - Answers AV 40-60 and ventricle 20-40
What is the primary funct...
Basic Arrhythmias Exam Questions with Complete Answers Latest Update 2024-2025
What is the primary pacemaker site of the heart and its intrinsic rate - Answers SA node 60-100
What are the two escape pacemaker sites and their intrinsic rates - Answers AV 40-60 and ventricle 20-
40
What is the primary function of the AV node and why is it important - Answers It catches and delays the
impulse, so the ventricles can fill=atrial kick
What value of time is associated with a small box - Answers .04
What value of time is represented between time line markers at the edge of EKG paper? - Answers 6
seconds, make sure it is 15 boxes
Which leads are referred as limb leads - Answers 1,2,3
What does the P wave represent? - Answers atrial depolarization (contraction)
What does the QRS wave represent? - Answers ventricular depolarization (contraction) and atrial
repolarization (relaxation)
What is normal qrs duration - Answers 0.12 seconds
What is the normal range for PR interval - Answers .12-.20 seconds
What does the T wave represent? - Answers Ventricular repolarization (ventricular relaxation)
When does the absolute refractory period begin and end? - Answers Starts at Q and ends at middle of T
When does the relative refractory period occur? - Answers Mid T to end of T
What is the heart rate if the R-R interval is exactly 3 large boxes apart - Answers 100
Normal QT interval - Answers <.45 sec or the QT is less than half of the R-R
What is atrial kick - Answers Towards the end of ventricular filling, left atrium contracts (atrial kick),
pumping remaining 30% of blood into right ventricle and left ventricle.
, cardiac output - Answers stroke volume x heart rate
Depolarization - Answers An electrical event that results in muscle contraction which is a mechanical
event
Myocardial muscle cells - Answers Contraction and relaxation (mechanical)
Myocardial pacemaker cells - Answers Nodes, bundles, and branching networks-the conduction of
electrical activity
AV node - Answers Secondary pacemaker (junctional rhythm). 40-60 bpm
QRS - Answers ventricular depolarization (contraction) and atrial repolarization happens at this same
period of time
1 big box time - Answers .20 seconds
How many small boxes in a big box - Answers 5 across (5x5 technically)
How many seconds are 5 big boxes - Answers 1 second
negative deflection - Answers the downward presentation of waveforms on the EKG tracing that is
located below the isoelectric line
P wave from atria - Answers May appear small, pointed, or biphasic, as a small squiggle, wavy or
sawtooth. Occasionally negative (inverted) if the ectopic site is close to AV junction.
P wave from AV junction - Answers Usually negative in lead two, may proceed or follow QRS , or be
hidden behind qrs and not visible.
What is normal pr interval? What happens if it is greater than or less than the normal time? - Answers
Normal PRI is 0.12-0.20. If it is <.12 sec then it is generated from the av junction. when it is > .20 sec and
it is a first degree av block
QRS time if impulse is originated from ventricles - Answers >.12 seconds. BBB is a type of block for wide
QRS
What is the J point? - Answers Where the QRS meets the ST segment
Elevates st segment - Answers MI (stemi), coronary artery spasm, acute pericarditis, ventricular
aneurysm, hyperkalemia, hypothermia
Depressed ST segment - Answers MI, NSTEMI, reciprocal changes associated with STEMI, hypokalemia,
digitalis effects-causes sagging ST
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