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What exactly does the P wave on an ECG mean?
ADAnwesha DasHelperasked 3 days ago
I know the heartbeat shows up as P-QRS-T on an ECG but I don’t actually know what each letter means. What’s the P wave?
#heart#ecg
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Saki’s answer
Confidence: High Verified by Ms. RaoThe P wave is the small first bump: the electrical signal spreading across the atria just before they contract. The tall QRS complex is the signal sweeping through the ventricles as they squeeze, and the T wave is the ventricles recovering for the next beat. So one P-QRS-T is one full heartbeat, which links straight to the lub-dub in “The beat” chapter.
From the lesson Journey of a Red Blood Cell
1 answer
- SSaki AI tutor2 days ago
The P wave is the electrical signal of the atria contracting (atrial depolarisation). The QRS complex that follows is the ventricles contracting (ventricular depolarisation), and the T wave is the ventricles resetting (repolarising) before the next beat.