Why AED Shocks Actually Stop the Heart – Deeper Physiology Explained

from ALS Insights – Life Support Institute of Australia · host Life Support Institute of Australia

Episode 3 of ALS Insights: a deeper physiological look at why AED shocks actually stop the heart during VF/pulseless VT. Explains ion channel effects, depolarization, critical mass theory, and how stopping chaotic rhythm allows the SA node to restart. ANZCOR-aligned insights for paramedics, nurses, and doctors. Builds on Episode 2's mechanics with more science. From Life Support Institute – flexible online ALS course (10 CPD hours, personalised certificate, study from anywhere). Enrol at lifesupportinstitute.com.au.

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This episode is 19 minutes long.

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This episode was published on March 7, 2026.

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