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Cards In This Set
| Front | Back |
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Interareterial pathway
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Movement of current between gap junctions from right to left letria
ensures both are depolarized and contract simultaneously |
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Electrical conductivity of the heart
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SA NODE -> ATRIA -> Av node --> VENTRICLES -> bundle of his --> INTRAVENTRICULAR SEPTUM -> purkinje fbers -> VENTRICULAR MYOCARDIUM
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AV nodal delay
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For complete ventricle fillingmakes sure atrium completely dpolarizes and contracts
without it, heart would contract at same time |
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Parasympathetic influence on SA node
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Delay rise to threshold and recovery (same AP)
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Sympathetic influence on SA Node
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Faster increase the threshold (same AP)
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P WAVE
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Atrial depolarization though internodal
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PR SEGMENT
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AV nodal delay (no net current)
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QRS complex
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(sympathetic)
ventricular depolarizing and repolarizing |
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ST segment
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No net currentventricles are completely depolarized
contractile cells @ plateaeu ventciles are contracting/emptying |
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T WAVE
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(parasympathetic)
ventricular repolarization |
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TP inerval
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Heart completely repolarized and at rest
ventricular is filling |
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Tachycardia
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RAPID heart rate >100 bpm
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Brachycardia
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SLOW heart rate <60bpm
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Atrial flutter
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Atria beating at high rate >200 bpm
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Atrial fibrillation
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Rapid irregular chatoic depolarization of atria (weird P wves)
AV node impules are irregular, little ventricular filling |
