Effect of intravenous calcitonin gene related peptide on ischaemia threshold and coronary stenosis severity in humans.

Abstract:

OBJECTIVE:Calcitonin gene related peptide (CGRP) is a potent vasodilator found in sensory nerve endings in coronary arteries. The effect of intravenous CGRP on myocardial ischaemia, cardiovascular haemodynamics, and epicardial coronary artery stenoses was studied in patients with angina to investigate the possible role of CGRP in the control of vasodilation in the coronary circulation. METHODS:12 patients (mean age 60 years) performed exercise tests on consecutive days during intravenous infusions of placebo or CGRP (at 50 pmol.min-1). At cardiac catheterisation (6 patients), consecutive 20 min intravenous infusions of placebo and CGRP were given at a fixed heart rate, with measurement of haemodynamic variables and quantitative arteriography. RESULTS:The time to 0.1 mV ST depression increased from 475(SD 245) to 546(193) s (p < 0.05), and time to 0.2 mV ST segment depression, from 634(266) to 694(202) s (p < 0.05), on placebo and CGRP respectively. Rate-pressure product at 0.1 mV ST segment depression was 18,410(4590) and 20,750(7270) mm Hg.min-1 (p < 0.05), and at 0.2 mV ST depression it was 21,510(6470) and 24,080(7380) mm Hg.min-1 (p < 0.01), with placebo and CGRP, respectively. At catheterisation, diastolic blood pressure fell from 93(11) to 83(8) mm Hg (p < 0.05), systemic vascular resistance fell from 26.2(9.4) to 20.7(9.0) units (p < 0.05), and cardiac output increased from 5.94(1.10) to 6.73(1.04) litre.min-1 (p < 0.05), on placebo and CGRP respectively. Minimum luminal diameter increased from 0.66(0.23) to 1.11(0.15) mm (p < 0.01) with CGRP. CONCLUSIONS:Intravenous CGRP is a systemic arterial vasodilator which dilates coronary arteries at the site of atheromatous stenoses and delays the onset of myocardial ischaemia during treadmill exercise testing in patients with chronic stable angina.

journal_name

Cardiovasc Res

journal_title

Cardiovascular research

authors

Uren NG,Seydoux C,Davies GJ

doi

10.1093/cvr/27.8.1477

subject

Has Abstract

pub_date

1993-08-01 00:00:00

pages

1477-81

issue

8

eissn

0008-6363

issn

1755-3245

journal_volume

27

pub_type

临床试验,杂志文章
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  • Ca2+-free perfusion of isolated rat heart: early irreversible changes and discrepancy between functional impairments and release of cellular constituents.

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    pub_type: 杂志文章,多中心研究

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  • Low TLR7 gene expression in atherosclerotic plaques is associated with major adverse cardio- and cerebrovascular events.

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  • Myocardial temperature reduction attenuates necrosis after prolonged ischemia in rabbits.

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    journal_title:Cardiovascular research

    pub_type: 杂志文章

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  • Additive cardioprotection by pharmacological postconditioning with hydrogen sulfide and nitric oxide donors in mouse heart: S-sulfhydration vs. S-nitrosylation.

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    pub_type: 杂志文章

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    pub_type: 杂志文章

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    journal_title:Cardiovascular research

    pub_type: 杂志文章

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  • Integrative genomics in cardiovascular medicine.

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  • Completing the genetic spectrum influencing coronary artery disease: from germline to somatic variation.

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    pub_type: 杂志文章

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    doi:10.1093/cvr/cvn140

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    更新日期:2008-09-01 00:00:00

  • Mechanisms of elevated plasma endothelin-1 in CHF: congestion increases pulmonary synthesis and secretion of endothelin-1.

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    pub_type: 杂志文章

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