AFORMED phenomenonmedical dictionary

As induced pulsus alternans progresses, a state in which alternating heart depolarisations fail to eject any blood, thus allowing longer diastolic filling; the subsequent beat is then able to produce a significant ejection; at high rates the cardiac minute volume and blood pressure may appear normal.

Origin: Alternating, failure of response, mechanical, to electrical depolarisation

(05 Mar 2000)

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