ISSN:
1432-1041
Keywords:
prostaglandin E1
;
microcirculation
;
inotropic activity
;
pre-ejection period
;
impedancecardiography
;
transcutaneous oxygen pressure
;
skin circulation
;
haemodynamic effects
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Medicine
Notes:
Summary A cumulative dose response to intravenous PGE1 was established in 12 healthy volunteers. Systolic time intervals, including pre-ejection period (PEP), the ventricular ejection time (VET) and the RR-interval, were continuously determined, and transcutaneous oxygen pressure (tcpO2) was recorded. RR-intervals fell in a dose dependent manner, reaching a significantly lower level at 128 ng·kg−1·min−1 of PGE1 (basal value 842 ms falling to 756 ms). PEP decreased from 89 ms to 74 ms and the ratio PEP/VET decreased from 35% to 30%, indicating increased myocardial contractility. The maximal increase in tcpO2 was 125% on the calf and 60% on the foot. The peak tcpO2 was observed at an infusion rate of 16 ng·kg−1·min−1 PGE1. A decline in tcpO2 was seen at infusion rates 〉64 ng·kg−1·min−1 PGE1, indicating a decrease in skin perfusion. The results indicate that the effects of intravenous PGE1 on skin perfusion occur at a lower threshold than the increase in myocardial contractility. A maximal increase in skin perfusion can be achieved with doses of PGE1 devoid of systemic haemodynamic effects.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00544556
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