![](https://nthumb.tpgimages.com/mid2_com_img/1339/30138/TOP28465473.jpg)
Sinoatrial node pacing current, illustration. The 4-phase membrane potential of sinoatrial node cells is unstable and can be depolarized spontaneously. After depolarization reaches the threshold potential, it triggers a new action potential. This electrophysiological feature is called automaticity. In the human heart, the sinoatrial node has the strongest self-discipline and the fastest rate of 4-phase spontaneous depolarization, and determines heart rate.
px | px | dpi | = | cm | x | cm | = | MB |
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Creative#:
TOP28465473
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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N/A
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No
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artworkillustrationdigitallygeneratednobodyno-onemedicinemedicalhealthcareconditionECGelectrocardiogramelectrocardiographmalesinusrhythmnormalECGaVLleadQRSwavePwaveSTsegmentTwavePRintervalsinoatrialnodemembranepotentialspontaneousdepolarizationdiastolicdepolarization4-phasedepolarizationthresholdpotentialactionpotentialautomaticityhumanheartsinusimpulsesinusrhythmsinusrhythmsinusPwavecardiologyheartdiagnosisdiagnostic
4-phaseECGECGPPPRQRSSTTaVLactionartworkautomaticitycardiologyconditiondepolarizationdepolarizationdepolarizationdiagnosisdiagnosticdiastolicdigitallyelectrocardiogramelectrocardiographgeneratedhealthcarehearthearthumanillustrationimpulseintervalleadmalemedicalmedicinemembraneno-onenobodynodenormalpotentialpotentialpotentialrhythmrhythmrhythmsegmentsinoatrialsinussinussinussinussinusspontaneousthresholdwavewavewavewave