This ectopic focus becomes the predominant pacemaker of the heart. When the atrial rate is greater than 100 beats per minute, the rhythm is atrial tachycardia. If less than 100 beats per minute ...

However, he said most AEDs will analyse the heart rhythm and only recommend a shock if one is needed, thus minimising the risk of any harm. “Hence, the potential benefits outweigh the risks.

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