HOMEPRODUCTSCOMPANYCONTACTFAQResearchDictionaryPharmaSign Up FREE or Login

Correlation of epicardial and systemic flow-mediated vasodilation in patients with atypical angina but no evidence of atherosclerotic disease.

AbstractBACKGROUND:
Atypical angina represents a diagnostic challenge and can be observed in the absence of significant coronary atherosclerosis. Endothelial dysfunction is a relevant marker of prognosis, considering cardiovascular events. The aim of the present study was to compare flow-mediated vasodilation (FMD) in systemic peripheral and epicardial coronary arteries. If noninvasive measurements of FMD in systemic arteries correlated with invasive measurements of coronary FMD, this may facilitate diagnostic approaches and determination of prognosis in patients with atypical angina in the future. Patients with atherosclerosis were excluded, because structural changes of coronary vessels may impair adequate comparison.
METHODS:
Endothelial function (ENF) of epicardial and systemic arteries was examined in 61 consecutive patients with atypical angina in whom significant atherosclerosis was excluded by coronary angiography. ENF of the epicardial arteries was examined during heart catheterization, measuring diameter changes of the proximal left anterior descending coronary artery (LAD) in response to reactive hyperemia, induced by locally administered adenosine via infusion catheter to the mid-segment of the LAD (coronary FMD [FMDc]). ENF of the radial artery was examined with high-resolution ultrasound, measuring peripheral FMD (FMDp) in response to reactive hyperemia induced by distal cuff occlusion. Endothelium-independent vasoreactivity to glycerol trinitrate was assessed.
RESULTS:
In patients with atypical angina in the absence of atherosclerosis, there was a significant correlation in ENF between coronary and systemic arteries (r=0.437; P=0.001). The underlying disease was myocardial inflammation (Inf) in 48 patients, in whom the mean (+/- SD) ENF of epicardial (FMDc-Inf 3.40+/-5.55%) and systemic (FMDp-Inf 3.69+/-2.93%) arteries was significantly impaired (P<0.001), compared with 13 control (Co) patients who had normal myocardial biopsies (FMDc-Co 14.51+/-8.62%; FMDp-Co 7.69+/-3.42%). FMD of coronary (r=-0.353; P=0.005) and systemic (r=-0.542; P<0.001) arteries correlated significantly with myocardial inflammation and endothelial activation.
CONCLUSIONS:
There was a significant correlation in FMD between coronary and systemic arteries in patients with atypical angina but without significant atherosclerosis. Inflammatory processes are associated with endothelial dysfunction of both vascular regions.
AuthorsKatja B Vallbracht-Israng, Andreas Morguet, Peter L Schwimmbeck
JournalThe Canadian journal of cardiology (Can J Cardiol) Vol. 23 Issue 13 Pg. 1054-60 (Nov 2007) ISSN: 0828-282X [Print] England
PMID17985007 (Publication Type: Comparative Study, Journal Article)
Topics
  • Adult
  • Angina Pectoris (diagnosis, physiopathology)
  • Cardiac Catheterization
  • Case-Control Studies
  • Coronary Artery Disease (immunology, physiopathology)
  • Coronary Circulation
  • Coronary Vessels (physiopathology)
  • Endothelium, Vascular (physiopathology)
  • Female
  • Humans
  • Inflammation (physiopathology)
  • Male
  • Middle Aged
  • Pericardium (physiopathology)
  • Prognosis
  • Statistics as Topic
  • Vasodilation (physiology)

Join CureHunter, for free Research Interface BASIC access!

Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease. Find out why thousands of doctors, pharma researchers and patient activists around the world use CureHunter every day.
Realize the full power of the drug-disease research graph!


Choose Username:
Email:
Password:
Verify Password:
Enter Code Shown: