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The A wave in a Wiggers diagram (atrial contraction) starts in the middle of which ECG wave?

User Kamesh
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Final answer:

The A wave in a Wiggers diagram starts in the middle of the P wave on an ECG.

Step-by-step explanation:

The A wave in a Wiggers diagram represents atrial contraction. It starts in the middle of the P wave on an ECG.

User Cevek
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