Photon Diffusion Attenuation Length in Tyrode and Blood-Perfused Myocardial Tissue
نویسندگان
چکیده
منابع مشابه
Biexponential Diffusion Observed in Myocardial Tissue Slices
Introduction Recent interest in myocardial diffusion imaging has provided new information regarding the microstructural organization of the heart (1,2), as well as alterations in the apparent diffusion constant (ADC) of water that occur during myocardial ischemia (3). Moreover, the demonstration that myocardial diffusion imaging can be performed in vivo (4) has dramatic implications for clinica...
متن کاملESTIMATION OF POTASSIUM, CALCIUM, AND MAGNESIUM IN BLOOD AND MYOCARDIAL TISSUE, AND DIAGNOSTIC IMPORTANCE OF URINARY MAGNESIUM EXCRETION IN EXPERIMENTALLY-INDUCED MYOCARDIAL INJURY
The results obtained in the present investigations point to a definite correlation between the onset of myocardial injury, electrocardiographic changes and biochemical changes. Changes in the electrocardiogram and elevated serum levels were paralleled by an increased excretion of magnesium in urine as early as one hour. Serum calcium and serum potassium levels did not show any significant ...
متن کاملReoxygenated effluent of Tyrode-perfused heart affects papillary muscle contraction independent of cardiac perfusion.
OBJECTIVE We determined, via a bioassay, if inotropic factors are released in the coronary circulation of the rat heart and if changes in cardiac perfusion change papillary muscle inotropy. METHODS An isolated isometrically contracting rat papillary muscle (n = 5, acceptor) was superfused with Tyrode or with reoxygenated coronary venous effluent from an isolated isovolumically beating rat hea...
متن کاملRelationship between arterial diameter and perfused tissue volume in myocardial microcirculation: a micro-CT-based analysis.
The volume of myocardial tissue that is perfused by an epicardial coronary artery has been shown to be predictably related to the diameter of the epicardial arterial lumen. However, to what extent the intramyocardial microvasculature follows the epicardial rules remains unclear. To explore the relationship between the diameter of coronary arterioles and their subsequent perfused myocardial volu...
متن کاملPattern differences between distributions of microregional myocardial flows in crystalloid- and blood-perfused rat hearts.
Regional myocardial flow distributions in Langendorff rat hearts under Tyrode and blood perfusion were assessed by tracer digital radiography (100-microm resolution). Flow distributions during baseline and maximal hyperemia following a 60-s flow cessation were evaluated by the coefficient of variation of regional flows (CV; related to global flow heterogeneity) and the correlation between adjac...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biophysical Journal
سال: 2011
ISSN: 0006-3495
DOI: 10.1016/j.bpj.2010.12.1936