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Relationships of pulse transmission times to pre ejection period and blood pressure

Relationships of pulse transmission times to pre ejection period and blood pressure

Psychophysiology 18(3): 316-321

The question of whether pulse transmission time to the ear (E-PTT) serves as a satisfactory estimate of pre-ejection period (PEP) and whether the intracardiac or arterial components of pulse transmission times are correlated with blood pressure were discussed. A median correlation of 0.86 was found for within subject [human] correlations between E-PTT and PEP and a correlation of 0.97 was found on trial means across subjects. Pulse transmission times to the ear and finger (measured from the Q-wave) were substantially correlated with systolic but not diastolic blood pressure. PEP, the intracardiac component of pulse transmission time, was moderately correlated with systolic blood pressure but the arterial components were not. E-PTT estimates PEP in within-subject comparisons and the association of the pulse transmission times with systolic blood pressure is because these intervals encompass PEP rather than the arterial components. Pulse transmission times more directly reflect sympathetic cardiac influences than they do blood pressure. The psychophysiological applicability of the experiments is discussed.

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Accession: 006303299

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PMID: 7291449

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