Results 351 to 360 of about 170,980 (396)

Coronary flow reserve and coronary occlusive disease

Transplant International, 1992
The functional effects of coronary occlusive disease (COD) in cardiac transplant patients on small-resistance coronary vessels are unclear. We investigated the changes in coronary flow reserve (CFR) in response to the non-specific smooth muscle vasodilator papaverine.
John Wallwork, Paul A. Mullins, C. Dennis, D. Aravot, John P. Scott, P. M. Schofield, S.R. Large   +6 more
openaire   +3 more sources

Coronary flow reserve is impaired in patients with slow coronary flow

Atherosclerosis, 2007
Slow coronary flow (SCF) in a normal coronary angiogram is a well-recognized clinical entity, but its etiopathogenesis remains unclear. However, previous studies have suggested that microvascular abnormalities and endothelial dysfunction responsible for SCF.
Alpay Turan Sezgin, Aylin Yildirir, Hakan Gullu, Dogan Erdogan, Haldun Muderrisoglu, Mustafa Caliskan   +5 more
openaire   +3 more sources

Coronary flow and flow reserve in children

Acta Paediatrica, 2004
Aortic blood pressure affects coronary blood flow, but within the normal physiological blood pressure range coronary blood flow is constant. The coronary flow is pulsatile, being maximal in the early diastole. There is a smaller systolic flow component. The low systolic pressure in the right ventricle favours systolic flow.
openaire   +3 more sources

Coronary Flow Reserve

2015
The seminal concept of coronary flow reserve (CFR) was proposed experimentally by Lance K. Gould in 1974 [1]. Under normal conditions, in the absence of stenosis, coronary blood flow can increase approximately four- to sixfold to meet increasing myocardial oxygen demands.
Eugenio Picano, Fausto Rigo
openaire   +2 more sources

Coronary flow reserve is reduced in sarcoidosis

Atherosclerosis, 2017
Sarcoidosis is a multisystem disease with frequent cardiac involvement, albeit manifest cardiac disease is rare. Though epicardial coronary arteries are not frequently involved, microvascular disease is rather common in both symptomatic and asymptomatic patients. The mechanism of microvascular involvement has not been elaborated yet.
Yusuf Yilmaz, Gonul Aciksari Kutlu, Kenan Demircioglu, Asiye Kanbay, Sibel Boga, Halil İbrahim Yakar, Seref Kul, Mustafa Caliskan, Murat Kavas, Tolga Sinan Güvenç   +9 more
openaire   +3 more sources

Problems of Coronary Flow Reserve

Annals of Biomedical Engineering, 2000
Coronary flow reserve is used to aid understanding why myocardial oxygen consumption may fail to meet demand. Its general aspects are well known, but the problems of using it are not. This manuscript describes three important factors that need to be considered when assessing coronary flow reserve.
openaire   +3 more sources

Invasive assessment of coronary flow reserve

Journal of Nuclear Cardiology, 2008
Coronary angiography is a well-established invasive method of defining coronary anatomy and forms the basis for most decisions between medical therapy, surgery, and percutaneous revascularization in patients with coronary artery disease. Angiography is limited, however, in that it solely provides anatomic information.
Fadi El-Ahdab, Michael Ragosta
openaire   +3 more sources

Coronary flow reserve measurements in hypertension

Medical Clinics of North America, 2004
Taken together, the diagnostic algorithm is leaded by a simple ECG stress test. In case of ST-segment depression the preferred image test should be stress ECG to bring patients at high risk for significant epicardial coronary artery stenosis to coronary angiography (and revascularization). In case of the lack of wall motion abnormalities (during stress-
Malte Kelm, Bodo E. Strauer
openaire   +3 more sources

Coronary CT Angiography-derived Fractional Flow Reserve: Machine Learning Algorithm versus Computational Fluid Dynamics Modeling.

Radiology, 2018
Purpose To compare two technical approaches for determination of coronary computed tomography (CT) angiography-derived fractional flow reserve (FFR)-FFR derived from coronary CT angiography based on computational fluid dynamics (hereafter, FFRCFD) and ...
C. Tesche, C. D. De Cecco, S. Baumann, M. Renker, T. McLaurin, Taylor M. Duguay, Richard R Bayer, D. Steinberg, K. Grant, C. Canstein, C. Schwemmer, M. Schoebinger, L. Itu, S. Rapaka, Puneet S. Sharma, U. Schoepf   +15 more
semanticscholar   +1 more source

Lesion Eccentricity and Fractional Flow Reserve and Coronary Flow Reserve in Coronary Arteries

2013
Fractional flow reserve has shown to be a gold standard in assessment of functional significance of coronary artery stenosis. Lesion eccentricity is an important geometric parameter which may affect the translational hemodynamics. Three dimensional quantitative coronary angiography (3D-QCA) was used to reconstruct the proximal or mid left anterior ...
Ashkan Javadzadegan, Leonard Kritharides, Andy S.C. Yong, Masud Behnia   +3 more
openaire   +2 more sources