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14 Cards in this Set
- Front
- Back
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AV NODE |
Delays impulses by .04 sec to stop ventricles from contracting too quickly, located between right atrium and ventricle |
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SA NODE |
Hearts main pacemaker, generates pulses 60-100 times per min, stimulus for atrial contraction |
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BUNDLE OF HIS |
Resumes rapid conduction of impulse through ventricles, stimulus for ventricular contraction, carry AV node activity to intraventricular septum |
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ELECTRICAL CONDUCTION PATH |
SA to AV to bundle of his to purkinje fibers |
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P WAVE |
Atrial contraction (depolarization) |
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QRS COMPLEX |
Ventricular contraction (depolarization) |
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ABSOLUTE REFRACTORY PERIOD |
Cardiac cells cannot be stimulated to depolarize |
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RELATIVE REFRACTORY PERIOD |
Cardiac cells have repolarized to their threshold potential and can be depolarized with a strong stimulus |
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SUPERNORMAL REFRACTORY PERIOD |
Stimulus that is weaker than normal can depolarize the cell |
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T WAVE |
Ventricular repolarization (most sensitive) (resting phase) |
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SINUS RHYTHM |
Rate: 60-100 bpm, Rhythm: regular |
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SINUS BRADYCARDIA |
Rate: <60bpm, Rhythm: regular |
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SINUS TACHYCARDIA |
Rate: 101-150bpm, Rhythm: regular |
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PR INTERVAL |
From SA node to AV node |
