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39 Cards in this Set
- Front
- Back
right & left sequential atrial depolarizatin & contraction are indicated by
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p wave
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r & l ventricular depolarization & contraction (atrial repolarization occurs during this time but is not seen; L ventricle dominates this complex due to size)
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QRS complex
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ventricular repolarization
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T wave
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time from the start of atrial depolarization to start of ventricular depolarization
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PR interval
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end of ventricular depolarization to end of ventricular repoliarization
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ST segment
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time from beginning of ventricular depolarization to end of ventricular repolarization
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QT interval
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PR interval should be within _____ ______ box. This is ____ seconds.
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1 large --0.2
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If PR interval is long think _______
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primary AV block
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QRS complex is normally within ____ _______ boxes. This is ______ seconds.
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2.5 small --0.1
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If QRS is greater than 0.1 seconds think _______, ________, ________, _______
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bundle branch block, Premature Ventricular Contractions, Ventricular pacing, Wolf Parkinson White syndrome
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QT interval is normally within ____ _____ boxes. This is _____ seconds.
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2 large - 0.4
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A prolonged QT encompasses more than half the distance between the _____ interval.
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R-R
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If QT is prolonged consider LOng QT syndrome caused by _____, ________, _______
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drugs (antiarrhythmics, phenothiazines)
electrolyte abnormalities Congenital Heart Disease |
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On ekg paper each small square equates to ______ seconds
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0.04
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On ekg paper each large square equates to ______ seconds
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0.2
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in 1 second _____ _____ squares are traversed
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5 large
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I, aVL, V5, V6 are _____ leads
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lateral
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II, III, aVF are ______ leads
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inferior
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V1, V2 are _______ leads(also show changes in posterior of heart)
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septal
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(V1, V2) V3, V4 are ______ leads
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anterior
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V1, V2 (septal) & usually II, III, aVF (inferior) depends on dominance pattern of coranary circulation
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right coranary artery
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V1-V4 (anterior
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LAD
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I, aVL, V5, V6 (lateral)
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circumflex
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If changes ccur only in V1, V2 = ______
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septal
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If changes occur only in V3-4 =_______
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anterior
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If change occur in V1-V4 = ____________
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anterior septal
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V1, V2 is _____ view of ________
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septal
RCA |
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V1,V2,V3,V4 is _____ view of ________
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anterior
LAD |
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I, aVL, V5, V6 is _____ view of ________
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lateral
circumflex |
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II, III, aVF is _____ view of ________
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inferior
RCA or LCA (depending on dominance [R is more common] |
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I, II, II are ________ leads, they form _______ triangle around the heart
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bipolar
einthoven's |
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aVR, aVL, aVF are _______, ______ starting from the heart and moving outward
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augmented, unipolar
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V1-V6 are ________ and give view of heart moving anteriorly and posteriory.
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precordial or chest
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the direction of mean electrical vector, representing the average directionof current flow. It is defined in the frontal plane only
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axis
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To determine the axis, find the lead in which the QRS is most nearly ______. The QRS axis must lie approximately _______ to that axis.
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biphasic
perpindicular |
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Quick extimate of axis:
normal EKG: Lead I is _____ Lead AVF is _____ |
+,+
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Quick extimate of axis:
Left deviation EKG: Lead I is _____ Lead AVF is _____ |
+,-
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Quick extimate of axis:
Right deviation EKG: Lead I is _____ Lead AVF is _____ |
-,+
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Quick extimate of axis:
Extreme Right deviation EKG: Lead I is _____ Lead AVF is _____ |
-,-
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