R wave

noun

ˈär-ˌwāv How to pronounce R wave (audio)
: the positive upward deflection in the QRS complex of an electrocardiogram that follows the Q wave

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“R wave.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/R%20wave. Accessed 23 Dec. 2024.

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