Ventricular systole occurs when the action potential from the AVN travels down the Bundle of His and Purkyne tissue, ensuring a bottom-up contraction of the ventricle walls and forcing blood into the pulmonary artery and aorta.
La sistole ventricolare avviene quando il potenziale d'azione dall'AVN viaggia lungo il fascio di His e il tessuto di Purkinje, assicurando una contrazione dal basso verso l'alto dei ventricoli e spingendo il sangue verso l'arteria polmonare e l'aorta.
| Front | How does ventricular systole occur? |
|---|---|
| Back | - wave of depolarisation arrives at AVN in floor of RA - AVN generates action potential - wave of depolarisation travels down Bundle of His in septum to apex of heart - passes up Purkyne tissue in ventricle walls - ensures bottom upwards contraction of cardiac muscle in ventricle walls - ensures blood is forced into pulmonary artery and aorta |
Tags: heart_rate
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