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39 Cards in this Set

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