nlwxpearo
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Location: England
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 Posted: Mon 10:57, 28 Feb 2011 Post subject: Fundus fluorescein angiography to determine retina |
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Fundus fluorescein angiography to determine retinal vascular damage in patients with essential hypertension
Clinical features,[link widoczny dla zalogowanych], but can overlap. In vascular contraction, the sharp rise in systemic blood pressure by a myogenic mechanism of self-regulation to stimulate retinal vascular tone in muscular arteries. Further the development of further damage to the vessel wall,[link widoczny dla zalogowanych], leading to reduced blood flow and ischemia. This was observed in the presence of primary retinal capillary blood flow in patients with hypertension sluggishness, the performance of development time in the arteries, veins and capillaries, filling time exchange time. A group,[link widoczny dla zalogowanych], l of the group, Ⅲ of the group, ADT,[link widoczny dla zalogowanych], VFT and CET values were compared with the normal group showed significant differences, and the stage level with the increase in blood pressure,[link widoczny dla zalogowanych], these three indicators are increasing. The sluggishness in the event of blood flow in capillary density is also accompanied by reduction in the value of the critical group MD compared with the control group showed significant differences on (P <0.05). And with the increase phased-level, MD are then gradually decline under normal circumstances, blood flow rate depends on the micro-circulation micro-circulation inlet pressure (Entrancepressure) and the capillary before the resistance. Micro 'circulation into the back pressure in l0.64 ~ l1.97kPa. Microcirculation inherent ability to adjust the pressure gradient]. High blood pressure cases, why have blood. Flow stagnated. The following factors may be: (D capillary network of small arteries of the increase in blood pressure can not produce adaptive response; ② inlet pressure and pressure ratio of circulation disorder]; ⑧ functional capillary sparse, due to increase in blood pressure, leading to the final the end of the temporary closure of the small arteries; ④ structural capillary rarefaction, which has been able to confirm who spontaneously hypertensive rats, which reduce the number of terminal arterioles 50]. The study also observed that while there is sparse retinal vascular hypertension phenomenon [will be published]. Some studies observed that in renal vascular resistance, high-salt and genetic hypertensive rats, multiple organ blood flow were reduced E. hypertensive patients, blood stagnation will have the following consequences: Slow lead to microvascular blood flow of low perfusion, resulting in substantial tissue damage. tissue damage and increased tissue hypoperfusion, and creating a vicious circle]. Therefore, the phenomenon of stagnant blood flow can not be ignored, studies have shown that a simple reduction pressure does not - can delay the effect of hypertension on target organ damage. so. from the tissue and cell levels to explore the mechanism of hypertension on target organ damage, even more important to find effective means of prevention. fundus fluorescence angiography capillary method is simple, sensitive, quantitative, objective, the method is recommended. ●
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