Intracoronary Saline-Induced Hyperemia During Coronary Thermodilution Measurements of Absolute Coronary Blood Flow: An Animal Mechanistic Study.

Détails

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Etat: Public
Version: Final published version
Licence: CC BY-NC-ND 4.0
ID Serval
serval:BIB_5CB621D84060
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Intracoronary Saline-Induced Hyperemia During Coronary Thermodilution Measurements of Absolute Coronary Blood Flow: An Animal Mechanistic Study.
Périodique
Journal of the American Heart Association
Auteur(s)
Adjedj J., Picard F., Collet C., Bruneval P., Fournier S., Bize A., Sambin L., Berdeaux A., Varenne O., De Bruyne B., Ghaleh B.
ISSN
2047-9980 (Electronic)
ISSN-L
2047-9980
Statut éditorial
Publié
Date de publication
04/08/2020
Peer-reviewed
Oui
Volume
9
Numéro
15
Pages
e015793
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
Background Absolute hyperemic coronary blood flow and microvascular resistances can be measured by continuous thermodilution with a dedicated infusion catheter. We aimed to determine the mechanisms of this hyperemic response in animal. Methods and Results Twenty open chest pigs were instrumented with flow probes on coronary arteries. The following possible mechanisms of saline-induced hyperemia were explored compared with maximal hyperemia achieve with adenosine by testing: (1) various infusion rates; (2) various infusion content and temperature; (3) NO production inhibition with L-arginine methyl ester and endothelial denudation; (4) effects of vibrations generated by rotational atherectomy and of infusion through one end-hole versus side-holes. Saline infusion rates of 5, 10 and 15 mL/min did not reach maximal hyperemia as compared with adenosine. Percentage of coronary blood flow expressed in percent of the coronary blood flow after adenosine were 48±17% at baseline, 57±18% at 5 mL/min, 65±17% at 10 mL/min, 82±26% at 15 mL/min and 107±18% at 20 mL/min. Maximal hyperemia was observed during infusion of both saline at body temperature and glucose 5%, after endothelial denudation, l-arginine methyl ester administration, and after stent implantation. The activation of a Rota burr in the first millimeters of the epicardial artery also induced maximal hyperemia. Maximal hyperemia was achieved by infusion through lateral side-holes but not through an end-hole catheter. Conclusions Infusion of saline at 20 mL/min through a catheter with side holes in the first millimeters of the epicardial artery induces maximal hyperemia. The data indicate that this vasodilation is related neither to the composition/temperature of the indicator nor is it endothelial mediated. It is suggested that it could be elicited by epicardial wall vibrations.
Mots-clé
absolute coronary flow, adenosine, coronary hyperemia, coronary thermodilution, endothelial shear stress, rotational atherectomy
Pubmed
Web of science
Open Access
Oui
Création de la notice
27/07/2020 15:29
Dernière modification de la notice
30/04/2021 7:10
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