Total left ventricular external power and aortic input impedance spectra were calculated from recordings of pulsatile pressure and flow in the ascending aorta of 22 human subjects undergoing cardiac catheterization. Eleven subjects had increased aortic pressure (systolic 153 + 3.8[SEM] mm Hg, p < .001; diastolic 91 + 2.4 mm Hg, p < .03; mean 118 ± 2.4 mm Hg, p < .001) and constituted the group ...

Chronic pulsatile subcutaneous administration of low doses of gonadotrophin releasing hormone (GnRH) is an effective therapy for men with hypogonadotrophic hypogonadism. Hypersensitivity reactions to GnRH are rare. We wish to report hypersensitivity reactions with intravenous GnRH after low dose subcutaneous pulsatile GnRH treatment in two men with hypogonadotrophic hypogonadism due to suprasel...

diastolic phase of cardiac function is associated with lower arterial flow and hence higher concentration of intra arterially injected drug is achieved at the site of injection. it is herein postulated that drugs show higher efficacy when injected during the diastolic phase of cardiac function. it is also postulated that this benefit cannot be achieved when the drug is injected with higher rate...

In cardiopulmoner operations patients can be perfused with a pulsatile or nonpulsatile pump mode. The extra energy maintained by the perfusion may have different effects on patient and oxygenator fiber rather than perfusion. Especially effect of fibers isn’t clearly known. purpose this study is to investigate non-pulsatile blood flows fibers. 18 out 32 that had an pediatric open heart surgery w...

BACKGROUND Left ventricular assist devices (LVADs) are now widely accepted as an option for patients with advanced heart failure. First-generation devices were pulsatile, but they had poor longevity and durability. Newer generation devices are nonpulsatile and more durable, but remain associated with an increased risk of stroke and hypertension. Moreover, little is understood about the physiolo...

In this numerical study particle behavior inside a sinusoidal pipe geometry is analyzed. The 3D consists of three identical modules, with periodic boundary condition applied to the flow in stream wise direction. incompressible, turbulent gas modeled using Large Eddy Simulation (LES) approach. Furthermore, dynamics are simulated Lagrangian point force approach incorporating Stokes drag and slip ...

Tinnitus may be continuous or pulsatile. Vascular lesions are the most frequent radiologically demonstrable cause of pulsatile tinnitus. These include congenital vascular anomalies (which may be arterial or venous), vascular tumours, and a variety of acquired vasculopathies. The choice of imaging depends on the clinical findings. If a mass is present at otoscopy, thin-section computed tomograph...

In addition to many overly restrictive simplifications of this type, the text offers some extraordinary and equally arresting therapeutic suggestions. In 1964, it is intriguing to discover that relief in pericarditis "is often obtained from the application of four or five leeches over the praecordium," that extract of ox gall may help the symptoms of acute hepatitis, and that "Kaolin poultices ...