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Systolic and diastolic time intervals in pulsus alternans - Significance of alternating isovolumic relaxation (1974)

Quarry, V. M. ; Khan, A. H. ; Spodick, D. H.

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Publication Date: 2019-06-27

Description: Systolic and diastolic time intervals in 14 cardiac patients with pulsus alternans revealed significant alternation of preinjection period (PEP), isovolumic contraction time (IVCT), left ventricular ejection time (LVET), ejection time index (ETI), PEP/LVET, and carotid dD/dt with better functional values in the strong beats. Cycle length, duration of electromechanical systole (EMS) and total diastole, i.e., isovolumic relaxation period (IRP) and diastolic filling period (DFP) occurred in 7 out of 8 patients. These diastolic intervals alternated reciprocally such that the IRP of the strong beats encroached upon the DFP of the next (weak) beats.

Keywords: BIOSCIENCES

Type: American Heart Journal; 87; Jan. 197

Format: text

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