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29 Cards in this Set
- Front
- Back
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The bundle of specialized nerve cells located in the upper portion of the right atrium is known as the
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SA Node
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If there are ten QRS complexes in a six second strip, then the heart rate is
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100
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The left anterior descending and the left circumflex arteries originate from the
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Left Main Artery
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Standard paper speed for the ekg is
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25 mm/sec
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One "little" block on the ECG paper represents how many seconds
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.04
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The bipolar lead, lead 2 has as its positive electrode
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left foot
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When a wave of depolarization moves away from a positive electrode a what deflection is recorded?
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Negative
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When comparing skeletal muscle to cardiac muscle, cardiac muscle has a
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longer refractory period
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The electrode placement for V4 is
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5th intercostal space mid clavicular line
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If lead 1 is nagative and lead AVF is positive, then the mean electrical axis is in what axis
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Right axis deviation quadrant
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If an ectopic focus fires near the AV Node
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there will be no P wave or an inverted P wave and a normal QRS
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When there are multiple ectopic foci firing at various rates and times in the atria, we cal this
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atrial fibrillation
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When there is a PVC every fourth beat this is referred to as
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Ventricular quadrigeminy
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Wen there is one ectopic focus firing rapidly in the ventriccles this could be
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Ventricular flutter, tachycardia or Torsades des pointes
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When analyzing the ECG, you should scan the tracing and look for
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a P wave for every QRS
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The mean electrical or QRS axis points
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down and to the left
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An escape beat or rhythm is determined based upon the
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period of prolonged absence of electrical activty
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When the rhythm starts at the AV node we generally refer to this as
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Junctional Rhythm
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Using Dubin's triplicates, if you started with an R wave on a large block and the next R wave was four large blocks away, what would the heart rate be
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75
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Hypokalemia is characterized by
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Prominent U Wave
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Hyperkalemia is characterized by
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Tall peaked T waves
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Hypocalcemia is characterized by
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prolonged Q-T interval
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Hypercalcemia is characterized by
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Shortened Q-T interval
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Wolf Parkinson White syndrome is characcterized by
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Wide QRS complex with delta wave
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We can often determine a pacemaker on the EKG because of the characteristic what
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SPIKE
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The EKG of a heart transplant recipient will have
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Remnant P Waves
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Bundle branch blocks cause
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A widening of the QRS complex
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Left bundle branch block is best seen in
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V5
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Right bundle branch block is best seen in
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V1
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