PMID- 11403666 OWN - NLM STAT- MEDLINE DCOM- 20010726 LR - 20190901 IS - 0160-564X (Print) IS - 0160-564X (Linking) VI - 25 IP - 5 DP - 2001 May TI - Change in vasoconstrictive function during prolonged nonpulsatile left heart bypass. PG - 371-5 AB - We investigated changes in vasoconstrictive function accompanying prolonged nonpulsatile left heart bypass (NLHB). After 2-week pulsatile left heart bypass (PLHB) in 11 goats, NLHB was conducted for another 4 weeks (Group N) in 6 goats. In the other 5 goats, PLHB was continued for another 4 weeks (Group P). Systemic vascular resistance at rest (rSVR) was measured on the last days of the second and sixth postoperative week (W2 and W6, respectively). Subsequently, phenylephrine was injected, and the maximum values (SVRmax) and the maximum increasing change in SVR (DeltaSVR) were measured. No significant difference was observed in rSVR between groups at W2 or W6. The SVRmax and the DeltaSVR at W2 were consistent in both groups. However, at W6, the SVRmax and the DeltaSVR of Group N were significantly lower than those of Group P. In conclusion, prolonged NLHB caused a significant decrease in the SVR response to phenylephrine, indicating a dimunition of vasoconstrictive function. FAU - Nishinaka, T AU - Nishinaka T AD - Department of Artificial Organs, National Cardiovascular Center Research Institute, Osaka, Japan. FAU - Tatsumi, E AU - Tatsumi E FAU - Nishimura, T AU - Nishimura T FAU - Shioya, K AU - Shioya K FAU - Ohnishi, H AU - Ohnishi H FAU - Taenaka, Y AU - Taenaka Y FAU - Takano, H AU - Takano H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Artif Organs JT - Artificial organs JID - 7802778 RN - 0 (Vasoconstrictor Agents) RN - 11000-17-2 (Vasopressins) RN - 1WS297W6MV (Phenylephrine) RN - EC 3.4.23.15 (Renin) RN - X4W3ENH1CV (Norepinephrine) SB - IM CIN - Artif Organs. 2001 Dec;25(12):1022-4. PMID: 11843773 CIN - Artif Organs. 2002 Sep;26(9):812-3; author reply 813-5. PMID: 12197939 MH - Animals MH - Blood Pressure MH - Goats MH - *Heart Bypass, Left MH - Heart-Assist Devices MH - Norepinephrine/blood MH - Phenylephrine/pharmacology MH - Renin/blood MH - Time Factors MH - Vascular Resistance/drug effects MH - *Vasoconstriction MH - Vasoconstrictor Agents/pharmacology MH - Vasopressins/blood EDAT- 2001/06/14 10:00 MHDA- 2001/07/28 10:01 CRDT- 2001/06/14 10:00 PHST- 2001/06/14 10:00 [pubmed] PHST- 2001/07/28 10:01 [medline] PHST- 2001/06/14 10:00 [entrez] AID - aor6778 [pii] AID - 10.1046/j.1525-1594.2001.025005371.x [doi] PST - ppublish SO - Artif Organs. 2001 May;25(5):371-5. doi: 10.1046/j.1525-1594.2001.025005371.x.