Review for EKG test
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each of the black spaces below before clicking
on it to display the answer.
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| Another name for the baseline | Iso Electric Line
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| Any deflection off the baseline is called a | wave
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| The distance between two waves | segment
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| the length of a wave and a segment | interval
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| heat and pressure sensitive | EKG paper
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| Normal paper speed | 25mm/sec
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| Normal standarization | 10mm, 0.2 sec
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| vertical plane represents | voltage
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| horizontal plane represents | time
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| how much time in one small square? | .04 secs
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| how much time in one large square? | 0.2 secs
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| time period when the myocardial cell cannot respond to stimulus | Refraction Period
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| ability of the myocardial cell to depolarize and polarize | Action Potential
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| part of EKG machine converts electrical activity into mechanical motion | Galvonometer
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| the writing implement on EKG machine | stylus
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| wave = Atrial depolarization | P wave
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| wave= Ventricular depolarization | QRS Complex
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| wave= Ventricular repolarization | T Wave
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| SA Node inherent rate | 60-100bpm
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| AV Node inherent rate | 40-60bpm
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| Purkinje Fibers inherent rate | 20-40 bpm
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| on all sinus EKG's, the initiation of the impulse is | SA Node
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| Normal value of PR Interval | 0.12-0.20
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| Wave not usually seen on EKG indicates electrolyte imbalance | U wave
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| how many waves are in one cardiac cycle? | 5
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| 1 heart beat- 1 systole + 1 diastole | 1 cardiac cycle
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| two or more waves together | "QRS" complex
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| Electrocardiogram is used to | diagnose arrhythmia, ischemia, electrolyte imbalances and myocardial injury
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| the Amplifyer in EKG machine | increases voltage or intensity of weaker signal
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| how many leads on EKG | 12
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| how many electrodes | 10
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| Limb Leads, 3 standard augmented | AVR, AVL, AVF
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| how many chest leads? | 6
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| Place V1 | 4ICS R margin of sternum
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| place V2 | 4ICS L margin of sternum
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| place V3 | midway between V2 & V4
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| place V4 | 5ICS @ mid-clavicular line
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| place V5 | 5ICS @ left anterior Axillary line
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| Place V6 | 5ICS @ mid Axillary line
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| Lead I | records V between RA & LA
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| Lead II | voltage between RA & LL
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| Lead III | voltage between LA & LL
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| RL | ground wire reference point
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| V1 is | red
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| V2 | yellow
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| V3 | green
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| V4 | blue
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| V5 | orange
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| V6 | purple
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| Limb Leads colors | white, green, black, red
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| RA | white
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| LL | red
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| LA | black
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| RL | green
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| another name for standard leads | bipolar
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| another name for augmented leads | unipolar
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| another name for chest leads | precordial
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| direction of electrical impulses | vector
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| 3 augmented leads | avl, avf, avr
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| standard limb leads | lead I,II, III
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| chest leads | V1-V6
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| lead records act f/mdpt b/w LA/LL | AVR
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