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20 Cards in this Set
- Front
- Back
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please trace electrical current running through the heart starting with the SA node
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SA node
Bundle of HIS Left and right bundles Left bundle further divides to: Anterior superior fascicle and Posterior Inferior Fasicle |
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do areas of that do not have automaticity conduct as quickly as those that do? what is the importance of this?
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NO!
this can show time intervals being prolonged |
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please list what occurs at point 1
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DEPOLARIZATION OF SA NODE
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please list what occurs at point 2
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P WAVE: depolarization of the right and left atrium
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please list what occurs at point 3
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DEPOLARIZATION OF AV NODE
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please list what occurs at point 4
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QRS WAVE: depolarization of septum, right, and left ventricles
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Le Bois
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wood
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please list what occurs at point 6
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T WAVE: repolarization of ventricles
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what causes the PR interval?
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slow conduction velocity across AV node
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measuring what interval can alert you to WPW (Wolff Parkinson White), 1 degree AV block or other potential blocks?
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PR interval
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What can give you a clue about WPW, IVCD, LBBB, or RBBB?
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QRS duration
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what is the normal PR interval?
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.12-.20 seconds
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what is the normal QRS duration?
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<.10 seconds
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what is the normal QT interval?
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1/2 RR
what is RR? distance from the start of one QRS to another |
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where does the QT interval start/end
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start: beginning of QRS
end: end of the T wave |
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what are some of the possible implications of prolonged QT interval?
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electrolyte imbalance, drug intox, myocardial ischemia, etc.
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draw Einthoven's Triangle
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draw Einthoven's Triangle
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Le Plastique
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plastic
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draw the hexaxial system
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