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16 Cards in this Set
- Front
- Back
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What is the nickname for axis deviation in slender,tall individuals?
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"vertical heart"
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What is the nickname for axis deviation in obese individuals?
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"horizontal heart"
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Mean QRS Vector points (blank)hypertrophy.
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towards
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Mean QRS Vector points (blank) infarction.
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away from
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What 2 leads have mainly positive deflection in QRS in normal Axis?
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I, AVF
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If Lead one is Negative, what is the direction of Mean QRS?
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Right Axis deviation
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(+ QRS in Lead 1, - QRS AVF) what direction is QRS?
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Left Axis Deviation
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What does isoelectric mean in relation to appearance of QRS complex in EKG?
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equal positive and negative deflection
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If QRS is in the normal range and is most isoelectric in AVF, what is the Axis in degrees? in III? in AVL? in I?
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AVF = 0; III = +30; AVL +60; I = +90
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What does an inverted P wave imply?
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retrograde atrial depolarization (from atrial focus or AV Node)
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What precordial lead is important for gathering information about Anterior and Posterior Infarction of the LV?
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V2
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Describe the normal progression of QRS complex in the precordial leads.
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Mainly negative to mainly positive from V1-V6.
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What leads do we look at for Axis Rotation?
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The precordial leads
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What sign do we look for on an EKG for determining atrial enlargement?
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diphasic P wave
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What is a sign of RV hypertrophy?
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large R wave in V1 (normally QRS is negative)
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How is LV hypertrophy determined on an EKG?
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V1 mm of S + V5 mm of R > 35mm; often you see T wave inversion also in L chest leads
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