Document Detail


Reciprocal relationship between left ventricular filling pressure and the recruitable human coronary collateral circulation.
MedLine Citation:
PMID:  15618046     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIMS: The aim of our study in patients with coronary artery disease (CAD) and present, or absent, myocardial ischaemia during coronary occlusion was to test whether (i) left ventricular (LV) filling pressure is influenced by the collateral circulation and, on the other hand, that (ii) its resistance to flow is directly associated with LV filling pressure. METHODS AND RESULTS: In 50 patients with CAD, the following parameters were obtained before and during a 60 s balloon occlusion: LV, aortic (Pao) and coronary pressure (Poccl), flow velocity (Voccl), central venous pressure (CVP), and coronary flow velocity after coronary angioplasty (V(Ø-occl)). The following variables were determined and analysed at 10 s intervals during occlusion, and at 60 s of occlusion: LV end-diastolic pressure (LVEDP), velocity-derived (CFIv) and pressure-derived collateral flow index (CFIp), coronary collateral (Rcoll), and peripheral resistance index to flow (Rperiph). Patients with ECG signs of ischaemia during coronary occlusion (insufficient collaterals, n = 33) had higher values of LVEDP over the entire course of occlusion than those without ECG signs of ischaemia during occlusion (sufficient collaterals, n = 17). Despite no ischaemia in the latter, there was an increase in LVEDP from 20 to 60 s of occlusion. In patients with insufficient collaterals, CFIv decreased and CFIp increased during occlusion. Beyond an occlusive LVEDP > 27 mmHg, Rcoll and Rperiph increased as a function of LVEDP. CONCLUSION: Recruitable collaterals are reciprocally tied to LV filling pressure during occlusion. If poorly developed, they affect it via myocardial ischaemia; if well grown, LV filling pressure still increases gradually during occlusion despite the absence of ischaemia indicating transmission of collateral perfusion pressure to the LV. With low, but not high, collateral flow, resistance to collateral as well as coronary peripheral flow is related to LV filling pressure in the high range.
Authors:
Stefano F de Marchi; Philipp Oswald; Stephan Windecker; Bernhard Meier; Christian Seiler
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2004-11-30
Journal Detail:
Title:  European heart journal     Volume:  26     ISSN:  0195-668X     ISO Abbreviation:  Eur. Heart J.     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-03-01     Completed Date:  2005-06-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8006263     Medline TA:  Eur Heart J     Country:  England    
Other Details:
Languages:  eng     Pagination:  558-66     Citation Subset:  IM    
Affiliation:
Cardiology, Swiss Cardiovascular Center Bern, University Hospital, CH-3010 Bern, Switzerland.
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MeSH Terms
Descriptor/Qualifier:
Aged
Angioplasty, Transluminal, Percutaneous Coronary
Collateral Circulation*
Coronary Angiography
Coronary Circulation*
Coronary Disease / diagnosis,  physiopathology*,  therapy
Electrocardiography
Female
Heart Catheterization
Humans
Male
Middle Aged
Prospective Studies
Ventricular Pressure*

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