| Influence of percutaneous coronary intervention on coronary microvascular resistance index. | |
| | |
MedLine Citation:
|
PMID: 15611371 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
BACKGROUND: Coronary microvascular resistance during maximal hyperemia is generally assumed to be unaffected by percutaneous coronary interventions (PCIs). We assessed a velocity-based index of hyperemic microvascular resistance (h-MR(v)) by using prototypes of a novel, dual-sensor (Doppler velocity and pressure)-equipped guidewire before and after PCI to test this hypothesis. METHODS AND RESULTS: Aortic pressure, flow velocity (h-v), and pressure (h-P(d)) distal to 24 coronary lesions were measured simultaneously during maximal hyperemia induced by intracoronary adenosine. Measurements were obtained in the reference vessel before PCI and in the target vessel before and after PCI, stenting, and ultrasound-guided, upsized stenting. h-P(d) increased from 57.9+/-17.0 to 85.5+/-15.6 mm Hg, and h-MR(v) (ie, h-P(d)/h-v) decreased from 2.74+/-1.40 to 1.58+/-0.61 mm Hg x cm(-1) . s after stenting (both P<0.001). The reduction in h-MR(v) accounted for 34% of the decrease in total coronary resistance achieved by PCI. h-MR(v) of the target vessel after PCI was lower than that of the corresponding reference vessel despite a higher h-P(d) in the reference vessel (P<0.01). Post-PCI baseline MR(v) was correlated with baseline P(d) before PCI (P<0.01). CONCLUSIONS: PCI-induced restoration of P(d) resulted in a reduction of h-MR(v) in accordance with the pressure dependence of h-MR(v). The decrease in h-MR(v) to a level below that of the corresponding reference vessel in the immediate post-PCI period and a lowered baseline MR(v) suggest microvascular remodeling induced by long-term exposure to a low-pressure environment. |
| | |
Authors:
|
Bart-Jan Verhoeff; Maria Siebes; Martijn Meuwissen; Bektas Atasever; Michiel Voskuil; Robbert J de Winter; Karel T Koch; Jan G P Tijssen; Jos A E Spaan; Jan J Piek |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2004-12-20 |
Journal Detail:
|
Title: Circulation Volume: 111 ISSN: 1524-4539 ISO Abbreviation: Circulation Publication Date: 2005 Jan |
Date Detail:
|
Created Date: 2005-01-04 Completed Date: 2005-06-27 Revised Date: 2007-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 0147763 Medline TA: Circulation Country: United States |
Other Details:
|
Languages: eng Pagination: 76-82 Citation Subset: AIM; IM |
Affiliation:
|
Department of Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adenosine
/
diagnostic use Aged Angina Pectoris / physiopathology, therapy Angioplasty, Transluminal, Percutaneous Coronary* / instrumentation Blood Pressure Coronary Angiography Coronary Circulation* Coronary Vessels / physiopathology* Female Hemodynamics Humans Hyperemia / physiopathology Male Microcirculation Middle Aged Stents Ultrasonography, Interventional Vascular Resistance* Vasodilator Agents / diagnostic use |
| Chemical | |
Reg. No./Substance:
|
0/Vasodilator Agents; 58-61-7/Adenosine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Transgenic mouse model of ventricular preexcitation and atrioventricular reentrant tachycardia induc...
Next Document: Protective role of angiopoietin-1 in endotoxic shock.