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Tap each part of the PQRST trace to learn what it shows.
QRS complex
Ventricular depolarisation, < 0.12 s. Wide = bundle branch block or ventricular origin. Atrial repolarisation is hidden here.
See a real image and a video lecture, or ask the AI Tutor to explain it your way.
Educational only — not clinical advice. Always confirm with your prescribed textbooks.