Epicardial Stenosis Severity Does Not Affect Minimal Microcirculatory Resistance
نویسندگان
چکیده
منابع مشابه
Epicardial stenosis severity does not affect minimal microcirculatory resistance.
BACKGROUND Whether minimal microvascular resistance of the myocardium is affected by the presence of an epicardial stenosis is controversial. Recently, an index of microcirculatory resistance (IMR) was developed that is based on combined measurements of distal coronary pressure and thermodilution-derived mean transit time. In normal coronary arteries, IMR correlates well with true microvascular...
متن کاملCoronary microcirculatory resistance is independent of epicardial stenosis.
BACKGROUND Recent studies show that coronary microcirculatory impairment is an independent predictor of poor outcomes in patients with cardiovascular disease. However, controversy exists over whether microcirculatory resistance, a measure of coronary microcirculatory status, is dependent on epicardial stenosis severity. Previous studies demonstrating that microcirculatory resistance is dependen...
متن کاملMicrovascular resistance is not influenced by epicardial coronary artery stenosis severity: experimental validation.
BACKGROUND The effect of epicardial artery stenosis on myocardial microvascular resistance remains controversial. Recruitable collateral flow, which may affect resistance, was not incorporated into previous measurements. METHODS AND RESULTS In an open-chest pig model, distal coronary pressure was measured with a pressure wire, and the apparent minimal microvascular resistance was calculated d...
متن کاملWhen collateral supply is accounted for epicardial stenosis does not increase microvascular resistance.
BACKGROUND The relationship between epicardial stenosis and microvascular resistance remains controversial. Exploring the relationship is critical, as many tools used in interventional cardiology imply minimal and constant resistance. However, variable collateralization may impact well on these measures. We hypothesized that when collateral supply was accounted for, microvascular resistance wou...
متن کاملEpicardial versus microcirculatory dissociation.
This exploratory analysis from a well-executed trial of provisional coronary stenting raises two important issues. The first is why should 26% of patients with successful stent implantation have an abnormal coronary flow reserve? Obviously, it is not because of significant residual stenosis (13 12%) or untreated major dissections (4·4% type C or D), but propably because of the ubiquitous disper...
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ژورنال
عنوان ژورنال: Circulation
سال: 2004
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.0000143893.18451.0e