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ECG strip

parts of the strip

QuestionAnswer
the first wave to appear P wave
the wave that represents right and left atrial depolarization (contraction) P wave
QRS complex represents right and left ventricular depolariztion & typically it is much larger than the P Wave because the ventricles re much larger than the atria
T wave represents ventricular repolarization (relaxation)
masked by the QRS complex T wave
U wave not always present;thought to represent a portion of ventricular repolarization
PR interval the distance between the beginning of the P wave and the beginning of the QRS complex
QT interval the distance between the beginning of the QRS complex and the end of the T wave
ST segment the distance between the end of the QRS complex and the beginning of the T wave
5 squares vertically represent 5mm 0.5 mv
5 squares horizontally represent 5mm 0.20 seconds
paper speed 25mm/sec
infants or fast rhythm paper speed 50mm/sec
calibration or standardization pulse squared off, upward deflection. 10mm height, .20 duration
one horizontal block (square) represents 1mm 0.04 seconds
how many leads are there 12
how many wires are there 10
three wires on the limbs record how many leads six - I, II, III, AVL, AVF, AVR
6 wires on the chest record how many leads six - V1-V6
how many Bipolar leads are there three - I, II, III
leads that are recorded between two points are called bipolar
leads that record from only one point are called unipolar
how many unipolar leads are there nine -AVR, AVL, AVF, V1-V6
records between right arm and left arm lead I
records between right arm and left leg lead II
records between left arm and left leg lead III
Created by: spicey
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