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45 Cards in this Set
- Front
- Back
What is a normal heart rate? |
60 - 100 bpm
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What is the thick line sequence for determining heart rate?
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300, 150, 100, 75, 60, 50
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Which lead is the rhythm strip normally based off of?
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Lead II
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What are the 3 irregularly irregular patterns?
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Atrial fibrillation
WAP (wandering atrial pacemaker) MAT (multifocal atrial tachycardia) |
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What is the key to diagnosing WAP?
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3 different p-waves
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In addition to lead II rhythm strips may be done using what lead?
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V5
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If the number of p-waves > number of qrs complexes what does that indicate?
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heart block of some sort
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MAT and WAP may be indicators of what disease process?
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COPD
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How will the QRS complex change if the impulse is conducted cell to cell instead of via the conduction pathway?
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Wider QRS complexes (e.g. PVCs, V-tach and BBB)
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Which interval will be shortened if a patient has premature atrial contractions?
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P-P interval
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How can you distinguish V-tach from PSVT?
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PSVT has narrow QRS complexes, while V-tach has wider QRS complexes
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In which ventricular rhythm abnormality is there a compensatory pause?
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PVCs
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In a patient with hypoxia or hypokalemia you may see a PVC fall on what wave?
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T-wave
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What is Joseph's sign?
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notching of the S-wave
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If the PR interval is greater than .2 what is the abnormality called?
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1st degree heart block
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What abnormality is characterized by progressively lengthening PR intervals followed by a dropped beat?
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Mobitz type I (2nd degree heart block)
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What abnormality is characterized by a group of regular beats followed by one dropped beat?
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Mobitz type II (2nd degree heart block)
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Heart rate > 160 with narrow QRS what is your Dx?
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PSVT
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What is the most common irregularly irregular heart rhythm?
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Atrial fib
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If the ventricular rate is 150 and regular what would your most likely Dx be?
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Atrial flutter
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If the heart rate is > 100 bpm and the QRS complexes are wide what would your most likely Dx be?
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V-tach
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What supplies blood the the SA node?
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Right coronary (60%)
Left Circumflex (40%) |
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What are connexins?
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Proteins that maintain the unidirection current flow in the heart
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What supplies the AV node with blood?
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RCA (85%)
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What channel predominates in pacemaker cells?
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Ca++ channel
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Where is the AV node located?
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Wall of the right atrium endocardium, anterior to R coronary sinus, above septal leaflet of tricuspid valve: triangle of kotch
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During which phase is there a plateau?
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phase 2, for muscle contraction
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Inferior wall infarcts may produce a parasympathetic discharge leading to what arrythmia on an EKG?
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bradycardia
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pacemaker rate of atrial cells?
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55-60
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pacemaker rate of av node?
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45-55
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pacemaker rate of bundles?
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40-45
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pacemaker rate of purkinje fibers?
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35-40
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pacemaker rate of myocardial cells?
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30-35
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Parasympathetic supply affects which parts of the heart?
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atria, SA, AV nodes
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Prolonged QT interval with P on U wave phenomenon indicative of?
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hypokalemia
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An EKG is normally set to record impulses traveling away from a lead as?
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negative
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Which EKG lead when placed properly is on the mid-clavicular line?
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V4 |
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Which EKG lead when placed correctly is on the anterior axillary line?
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V5
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Which EKG lead when place in the proper position is on the mid axillary line?
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V6
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The hexaxial system splits the heart into a _____ half and _____ half?
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Front half & back half
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The precordial lead system splits the heart into a ____ half and ___ half?
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Bottom half & Top half
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Which EKG leads monitor the septal wall of the heart?
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V1 & V2
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Which EKG leads monitor the anterior wall of the heart?
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V3 & V4
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Which leads monitor the inferior wall of the heart?
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Leads I, II, & III
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Which leads monitor the lateral wall of the heart?
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V5 & V6
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