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Both the sinoatrial node and the atrioventricular node have automaticity, but the sinoatrial node's 4-phase diastolic phase has a faster rate of acceleration and generates faster impulses.

Both the sinoatrial node and the atrioventricular node have automaticity, but the sinoatrial node's 4-phase diastolic phase has a faster rate of acceleration and generates faster impulses.

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