Chapter 2: Recording the EKG Flashcards
The smallest divisions on EKG graph paper are…
…one millimeter (mm) squares.
p. 31
Between the heavy black lines are __ small squares.
5
p. 31
The height and depth of a wave are measured vertically from the baseline in millimeters, and this vertical _________ represents a measure of _______.
amplitude
voltage
(p. 32)
Ten millimeters vertically represents ___ _________ (__), however, in practice, one usually speaks of millimeters.
one millivolt (mV) (p. 32)
The amount of time represented by the distance between 2 heavy black lines is…
… 0.2 sec.
p. 34
Each small division between two fine lines represents…
… 0.04 of a sec (four hundredths of a second)
p. 34
The conventional standard for where to place limb electrodes is on the…
…right arm, left arm, and left leg.
p. 37
The placement of these 3 limb electrodes is the same as originally used by…
…Willem Einthoven.
p. 37
Recording a lead…
…requires at least two electrodes.
p. 37
Because one electrode is ________ and one is ________, these leads are called “_______” limb leads.
positive, negative, bipolar
p. 38
Lead I is horizontal, and its ____ arm electrode is ________, while its right arm electrode is ________.
left, positive, negative
p. 38
When looking at lead III, the ____ arm electrode is now ________, and the left leg electrode is ________.
left, negative, positive
p. 38
The EKG machine permits us to make any skin electrodes…
…positive or negative depending on which lead the machine is recording.
(p. 38)
The bipolar limb lead configuration is sometimes called…
…“Einthoven’s triangle”.
p. 38
The three bipolar limb leads can be moved to the center of the imaginary triangle, producing…
….3 intersecting lines of reference, which remain at the same angles relative to each other.
(p. 39)
The AVF lead uses the ____ ____ electrode as ________ and both arm electrodes as a common ground (________).
left foot
positive
negative
(p. 40)