Relative Refractory Period

In phase 3 of the action potential, once the cell repolarizes to threshold potential to –90 mV, the cell’s ion channels are once again receptive to depolarization; this period is also called the supernormal period – minimal impulse energy is required to stimulate sufficient ion transfer to reach threshold potential once again and cause depolarization.

1. Six Second ECG Guidebook (2012), T Barill, p. 204

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  Six Second ECG Intensive Six Second ECG Mastery 12 Lead ECG & ACS 12 Lead Advanced
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Any Six Second ECG Course

12 Lead ECG & ACS

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Completion Card
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Reference materials included
Dynamic ECG rhythm interpretation
Static ECG rhythm interpretation
Clinical Impact Mapping
Acute Coronary Syndromes Overview
Acute Coronary Syndromes In-Depth
ST Segment & T Wave Differential
Identify Bundle Branch Blocks
15 | 18 Lead View Mapping
Electrical Axis
R Wave Progression
Left Bundle Branch Blocks with ACS
Atypical Findings
Acute Non-Ischemic Disease Conditions
Special Cases

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