Atrial systole occurs when the SA node generates an action potential that spreads across the atrial walls, causing simultaneous contraction of the cardiac muscle in the left and right atria.
L'attività sistolica atriale si verifica quando il nodo SA genera un potenziale d'azione che si diffonde attraverso le pareti atriali, causando la contrazione simultanea del muscolo cardiaco negli atri sinistro e destro.
| Front | How does atrial systole occur? |
|---|---|
| Back | - SA node generates action potential - wave of depolarisation spreads across atrial walls - cardiac muscle in LA and RA walls contract simaltaneously |
Tags: heart_rate
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