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34 Cards in this Set
- Front
- Back
SA node is supplied with blood from the RCA what percent of the time? LCA? Both?
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59%
38% 3% |
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Prolonged QT can be associated with what 2 electrolyte abnormalities?
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Hypocalcemia
Hypomagnesemia |
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Pacemakers do not work with what electrolyte abnormality?
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Hyperkalemia
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Leads involved in an inferior MI?
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Leads II, III, aVF
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Leads involved in a Septal MI?
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Leads V1, V2
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Leads involved in an Anterior Wall MI?
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V3, V4
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Leads involved in a Lateral Wall MI?
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Leads I, aVL, V5, V6
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What is the cause behind sinus arrhythmia?
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Varies with respiration
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What is the difference between Wandering Atrial Pacemaker and Multifocal atrial tachycardia?
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MAT is WAP with tachycardia
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Describe Multifocal Atrial Tachycardia:
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Rate: Greater than 100
Rhythm: Irregularly Irregular P wave: At least 3 morphologies |
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Describe the difference between Mobitz type I and II second degree block?
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Type I: Wenckeback: Progressive prolongation of PR interval.
Type II: Same PR interval before a dropped beat. |
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In what leads are P waves almost always positive? What can you consider if these are negative?
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I, II, V4, V5, V6
If the P's are inverted, consider low pacemaker or AV node pacemaker. |
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An M shaped P wave, >0.12s in Leads I, II represents what?
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Left atrial enlargment.
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What is a finding is aVL that would signify LVH?
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R wave greater that 11mm
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What are the EKG findings in Right Atrial Enlargment?
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P waves greater that 2.5 mm high. Most commonly in leads II, III.
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A biphasic P wave in V1 is consistent with what finding?
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Left aftrial
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When you see PR depression, what syndromes findings could fit with that finding?
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Pericarditis
Atrial Infarction |
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What is the normal PR interval?
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0.12 to 0.20 seconds
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Delta wave is seen in what condition?
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WPW
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Sgarbossa's criteria
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ST elevation ≥1 mm in a lead with upward (concordant) QRS complex - 5 points
ST depression ≥1 mm in lead V1, V2, or V3 - 3 points ST elevation ≥5 mm in a lead with downward (discordant) QRS complex - 2 points ≥3 points = 90% specificity of STEMI (sensitivity of 36%) |
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EKG criteria for LVH:
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Add the depth of the S wave in V1 or V2 to the R wave of V5 or V6. If >35 mm = LVH.
Or aVL R wave >11 I R > 12 aVF R >20 |
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Determining LVH: Add the depth of the _ wave in V1 or V2 to the _ wave of V5 or V6. If >__ mm = LVH
Or aVL R wave >11 I R > __ aVF R >20. |
S
R 35 12 |
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Causes of RVH:
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PE
Pulmonary HTN Scarring |
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What are the EKG findings in V1 or V2 that show RVH?
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R:S ratio greater than 1
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What EKG findings make Q waves pathologic?
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Q wave >0.03 seconds or Q 1/3 of size of R wave.
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Where is the QS wave found generally?
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V1, if it extends into V2, V3 it could signify anteroseptal MI.
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When does the Osborn or J wave present?
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Hypothermia
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QRS notching is also known as what?
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Early repolarization
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What are the main criteria for RBBB on EKG?
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QRS >0.12 s
Slurred S wave in leads I and V6 RSR' in V1 with R' larger than R |
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Symmetric vs. Asymmetric T waves, which is sign of potential MI?
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Symmetric
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S_Q_T_ pattern is seen in patients with large pulmonary embolism causing Right heart strain.
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1
3 3 |
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S1Q3T3 is seen in what condition?
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PE, Right heart strain
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In addition to RVH, R:S >1 is seen in what type of MI?
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Posterior Wall MI
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Hedgehogs
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Gbjfc
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