Calcitonin gene-related peptide increases coronary flow and decreases coronary resistance

Christopher D. Joyce, Richard A. Prinz*, John X. Thomas, Ronald R. Fiscus, Xian Wang, Goldie Djuricin, H. Kurt Jacobs

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Calcitonin gene-related peptide (CGRP) is a potent vasodilator, but its effects on in situ ventricular function are unknown. We studied effects of intracoronary CGRP (100, 200, and 600 pmole/min, for 10 min) in 21 open-chest chloralose-anesthetized dogs. Systemic, pulmonary, left ventricular (LVP), central venous, and pulmonary capillary wedge pressures were continuously monitored. Left ventricular wall thickness (WT) and circumflex coronary blood flow were also measured. CGRP was infused into the proximal circumflex artery. During CGRP infusion there were no changes in heart rate, cardiac index, pulmonary artery pressure, or systemic vascular resistance, no percentage change in ventricular WT, and no changes in dWT/dt, peak dP/dt, or the slope of endsystolic points on WT/LVP loops. But there were significant changes in coronary flow (CQ), coronary resistance (CRES) and mean arterial blood pressure (MAP) from control (C)* (P < 0.05). {A table is presented} CGRP is a potent coronary artery vasodilator causing notable dose-dependent decreases in coronary resistance and a rise in myocardial flow, despite a decreased MAP (all P < 0.05). CGRP does not affect ventricular contractility in vivo.

Original languageEnglish (US)
Pages (from-to)435-440
Number of pages6
JournalJournal of Surgical Research
Volume49
Issue number5
DOIs
StatePublished - Nov 1990

ASJC Scopus subject areas

  • Surgery

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