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Definition: as induced pulsus alternans progresses, a state in which alternating heart depolarizations 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.
[Alternating failure of response, mechanical, to electrical depolarization]
Examples: glitazone, GI cocktail, etc.
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