Venous pulsation in the orbit
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چکیده
منابع مشابه
Pulsation and Orbit of AU Pegasi
AU Pegasi is a pulsating star in a spectroscopic binary system with an orbital period of 53.26 days. Between 1960 and 1990 an extremely rapid period increase was observed in the value of the pulsation period, but in the last 15 years the observation show that the period set in 2.411 days. Fourier analysis of photometric data obtained during the ASAS project and those taken at the Piszkéstető Mo...
متن کاملSpontaneous retinal venous pulsation: aetiology and significance.
Spontaneous retinal venous pulsation is seen as a subtle variation in the calibre of the retinal vein(s) as they cross the optic disc. The physical principles behind the venous pulsations has been the point of much debate. Initial theories suggested that the pulsation occurred because of the rise in intraocular pressure in the eye with the pulse pressure. This article presents an argument that ...
متن کاملThe clinical validity of the spontaneous retinal venous pulsation.
BACKGROUND The validity of the clinical dictum "the presence of spontaneous retinal venous pulsation (SVP) excludes raised intracranial pressure" has not been previously tested. We set out to determine the specificity and positive predictive value (PPV) of the presence of SVP to indicate normal intracranial pressure (ICP) in a routine clinical setting. METHODS We prospectively recruited patie...
متن کاملIntraocular Pressure Reduction Is Associated with Reduced Venous Pulsation Pressure
PURPOSE To explore whether alterations in intraocular pressure (IOP) affect vein pulsation properties using ophthalmodynamometric measures of vein pulsation pressure. PATIENTS AND METHODS Glaucoma patients had two retinal vein pulsation pressure (VPP) measurements from upper and lower hemiveins performed by ophthalmodynamometry at least 3 months apart. All subjects had VPP and IOP recorded at...
متن کاملDecrease of venous return caused by right atrial pulsation.
• For almost as long as the problem of venous return has been studied, two different factors have been claimed to be important in determining venous return to the heart." These are: (1) the force of the systemic arterial pressure pushing blood through the systemic circulation toward the heart, and (2) factors on the venous side of the heart that affect venous return, including rhythmic suction ...
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ژورنال
عنوان ژورنال: Journal of the Royal Society of Medicine
سال: 2000
ISSN: 0141-0768,1758-1095
DOI: 10.1177/014107680009300622