AIMS Myocardial blood flow (MBF) is the gold standard to assess myocardial blood supply and, as recently shown, can be obtained by myocardial contrast echocardiography (MCE). The aims of this human study are (i) to test whether measurements of collateral-derived MBF by MCE are feasible during elective angioplasty and (ii) to validate the concept of pressure-derived collateral-flow assessment. ...

The role of renal sympathetic nerve activity (RSNA) in the physiological regulation of medullary blood flow (MBF) remains ill defined, yet regulation of MBF may be crucial to long-term arterial pressure regulation. To investigate the effects of reflex increases in RSNA on intrarenal blood flow distribution, we exposed pentobarbital sodium-anesthetized, artificially ventilated rabbits (n = 7) to...

BACKGROUND The purpose of this study was to determine whether myocardial perfusion can be quantified with myocardial contrast echocardiography using left atrial (LA) injection of contrast. METHODS AND RESULTS Based on a series of in vitro and in vivo experiments, the optimal dose of sonicated albumin microbubbles injected into the LA for establishing a linear relation between video intensity ...

OBJECTIVE To measure intrapericardial fat (IPF), extrapericardial fat (EPF), and myocardial perfusion (MBF) in patients with and without coronary artery disease (CAD), hypothesizing that perfusion is more strongly associated with IPF because it is in direct anatomic contiguity with the myocardium or coronary arteries. METHODS AND RESULTS Fat surrounding the heart may increase the risk of CAD ...

Myocardial ischemia was produced for 2 hours by coronary ligation in 11 dogs pretreated with methylprednisolone (MP, 30 mg/kg). Myocardial blood flow (MBF) was measured with microspheres (IS fun) in each tissue sample used for enzymatic analysis. Homogenates of these tissue samples were separated by ultracentrifugation into lysosome-rich and microsomal fractions and were analyzed for JV-acetyl-...

A self-administered mailed questionnaire was used to assess the health behaviours and health status of a random sample of members of the Medical Benefits Fund of Australia Limited (MBF). The data reaffirmed that the privately insured were more likely to have lower levels of major health risks and to practise better prevention than the uninsured. The survey was useful as a planning tool for MBF,...

Background Quantitative first pass cardiac magnetic resonance (CMR) perfusion imaging has shown excellent interobserver agreement at a sector level in healthy volunteers and patients. In this study, we compare the myocardial blood flow (MBF) estimates in sector-wise and pixel-wise analysis. We also study the interobserver variability in pixel-wise MBF estimates from patients with coronary arter...

Abstract Background The usefulness of computed tomography myocardial perfusion (CTP) to assess hemodynamically significant epicardial coronary artery lesions has been previously reported. However, the diagnostic value quantitative evaluation absolute flow by CTP detect microvascular dysfunction remains unknown. Purpose aim study is evaluate (CMD) in patients with stenosis, and analyze predictin...

In this work, an economical modifier silane agent—KH550—was used for surface treatment of basalt fiber. Then, a biodegradable poly(butylene succinate) (PBS)/modified basalt fiber (MBF) biocomposite was successfully developed. The effects of silane treatment and fiber mass content on crystalline structure, isothermal crystallization process and mechanical performance of composites were evaluated...

Postextrasystolic potentiation was studied during control and 5 minutes after coronary occlusion in epicardial and endocardial regions of 12.open-chest dogs. Segmental behavior evaluated with ultrasonic crystals. was correlated with regional myocardial blood flow (MBF) measured with radioactive inicrospheres. A similar correlation was found between the percentage of systolic shortening in poste...