Which ECG wave is typically the last deflection in a normal cycle?

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Multiple Choice

Which ECG wave is typically the last deflection in a normal cycle?

Explanation:
Understanding the sequence of ECG waves helps explain why the U wave is the last deflection in a typical cycle. After the atria depolarize, the ventricles depolarize (the QRS complex), then ventricles repolarize (the T wave). A small, subsequent deflection known as the U wave can appear after the T wave, and when it is present it marks late ventricular repolarization, making it the final deflection in the cycle. Keep in mind U waves are not always visible in every normal tracing, but when they appear, they come after the T wave and thus are the last deflection.

Understanding the sequence of ECG waves helps explain why the U wave is the last deflection in a typical cycle. After the atria depolarize, the ventricles depolarize (the QRS complex), then ventricles repolarize (the T wave). A small, subsequent deflection known as the U wave can appear after the T wave, and when it is present it marks late ventricular repolarization, making it the final deflection in the cycle. Keep in mind U waves are not always visible in every normal tracing, but when they appear, they come after the T wave and thus are the last deflection.

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