Rhythm InterpretationCâu 5 / 100
What electrical event does the P wave represent on an EKG tracing?
a.Ventricular repolarization
b.Ventricular depolarization
c.Atrial depolarization
d.Atrial repolarization
Giải thích
The P wave is the small rounded deflection produced when the impulse from the SA node spreads across both atria and depolarizes them, which triggers atrial contraction. Ventricular depolarization produces the QRS complex, and ventricular repolarization produces the T wave. Atrial repolarization does occur, but it is buried inside the much larger QRS complex and is not normally visible.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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