What is the QRS duration of PVCs?

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Multiple Choice

What is the QRS duration of PVCs?

Explanation:
PVCs produce a wide QRS because the impulse starts in the ventricle and depolarizes through ventricular muscle rather than the fast His–Purkinje network. This slower, cell-to-cell spread makes the QRS duration longer than normal, typically 0.12 seconds or more. So the best description is a QRS duration of 0.12 seconds or wider. The normal QRS ranges (around 0.08–0.10 seconds) are not characteristic of PVCs, and while a QRS of 0.20 seconds is also wide, the standard way to express the concept is that PVCs have a QRS duration of 0.12 seconds or longer.

PVCs produce a wide QRS because the impulse starts in the ventricle and depolarizes through ventricular muscle rather than the fast His–Purkinje network. This slower, cell-to-cell spread makes the QRS duration longer than normal, typically 0.12 seconds or more. So the best description is a QRS duration of 0.12 seconds or wider. The normal QRS ranges (around 0.08–0.10 seconds) are not characteristic of PVCs, and while a QRS of 0.20 seconds is also wide, the standard way to express the concept is that PVCs have a QRS duration of 0.12 seconds or longer.

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