pulsus alternans
noun
pul·sus al·ter·nans
ˈpəl-səs-ˈȯl-tər-ˌnanz 
: alternation of strong and weak beats of the arterial pulse due to alternate strong and weak ventricular contractions
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“Pulsus alternans.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/pulsus%20alternans. Accessed 24 Nov. 2024.
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