Is There Functional Collateral Flow During Vascular Occlusion in Angiographically Normal Coronary Arteries?

Is there functional collateral flow during vascular occlusion in angiographically normal coronary arteries?

BACKGROUND Thus far, it is unknown whether there is functional collateral flow through preexisting anastomoses in patients with angiographically normal coronary arteries. Such preformed coronary collateral vessels could form the basis for subsequently developing protective natural bypasses in the presence of coronary artery disease. METHODS AND RESULTS Among 100 patients, the collateral flow ...

Predictors of slow flow in angiographically normal coronary arteries.

INTRODUCTION Slow coronary flow (SCF) is a well-known angiographic finding; however, the pathophysiology of SCF remains only partially understood. In this study, we have examined the risk factors of slow coronary flow. METHODS Seventy patients with angiographically proven SCF were studied along with 60 control participants. Patients were divided into 2 groups based on the angiographic finding...

Myocardial infarction with angiographically normal coronary arteries.

Myocardial Infarction with Normal Coronary Arteries (MINCA) is an important subgroup of myocardial infarction with a frequency of at least 3-4% of all myocardial infarctions. The interest and awareness of MINCA have increased recently due to the frequent use of coronary angiography, the description of Takotsubo stress cardiomyopathy and new sensitive troponin assays. Since myocarditis may mimic...

Transient Collateral Arteries Developed during Coronary Vasospasm

CORONARY BLOOD FLOW Collateral conductance changes during a brief coronary occlusion in awake dogs

Function of the coronary collateral circulation during the course of a single abrupt coronary occlusion was evaluated in awake dogs instrumented over the long term. Studies were performed approximately 2 weeks after collateral development had been stimulated in the dogs by partial stenosis of the proximal left circumflex coronary artery. The pressure drop from the central aorta to the distal ci...