BACKGROUND The role of coronary stenting in the treatment of patients with small vessels is not well defined. The purpose of this study was to investigate the influence of vessel size on long-term clinical and angiographic outcome after coronary stent placement. METHODS AND RESULTS The study comprised 2602 patients with successful stent implantation for symptomatic coronary artery disease. Pa...

Mechanism of coronary spasm was examined regarding endothelium-related relaxation and contraction produced by smooth muscle cells of spastic vessels isolated from Göttingen miniature pigs. In these pigs, coronary artery spasm was documented angiographically in vivo three months after endothelial denudation, and spastic and control segments of the coronary artery were suspended in organ chambers...

Introduction: Coronary artery disease secondary to atherosclerosis is the most common cause of mortality. Coronary angiography is the most precise method for determining the extent of disease in the coronary vascular bed. Arterial stiffness has been proposed as a marker of atherosclerosis in some studies. One of the noninvasive methods for the determination of arterial stiffness is Doppler echo...

AS GENERALLY agreed, the magnitude . of coronary flow is determined by the pressure head at the coronary ostia, the vasomotor tonus of the coronary vessels, and the compression exerted upon the intramural vessels by the beating heart muscle (not considering here: blood viscosity, coronary venous pressure, and certain other factors). Coronary flow is usually more than sufficient to supply the he...

In this paper, an effective method is developed to extract coronary vessels from X-ray digital subtraction angiography (DSA). Unlike the traditional image subtraction technique, we used the independent component analysis (ICA) to separate the coronary vessels and backgrounds. Experimental results indicate that the proposed method can achieve better performance than the traditional & 2011 Elsevi...

The isolated hearts of guinea pigs sensitized to horse serum have been shown to react characteristically upon exposure to small amounts of antigen. The cardiac rate is temporarily accelerated and transient alterations in amplitude of contraction are to be observed. Electrocardiographic abnormalities, previously recorded by remote leads during anaphylactic shock in the intact animal, have been r...

0.5 Coronary vasomotion, which controls myocardial perfusion, is closely regulated by myocardial metabolic demand and has been assessed by changes of coronary vascular resistance. Only two decades ago evidence of neural and hormonal control overriding the metabolic control of coronary arterioles, which represent the "resistance vessels" was reported (fig 1). Numerous groups reported persistence...

Several studies have indicated that plasma viscosity contributes to cardiovascular risk in men. So far, a significant relationship between plasma viscosity and the severity of coronary heart disease has not been found. Thus, the present study is the first to report on the relationship of plasma viscosity and the severity of coronary heart disease. In a collective of 1142 male myocardial infarct...