نتایج جستجو برای: left to right shunts
تعداد نتایج: 10722382 فیلتر نتایج به سال:
BACKGROUND Patent foramen ovale (PFO) is prevalent in patients with migraine with aura. Observational studies show that PFO closure resulted in migraine cessation or improvement in approximately 80% of such patients. We investigated the effects of PFO closure for migraine in a randomized, double-blind, sham-controlled trial. METHODS AND RESULTS Patients who suffered from migraine with aura, e...
N UMEROUS reports confirm the unequivocally superior sensitivity of hydrogen gas as used electrometrically for the detection of both left-to-right and right-to-left circulatory shunts when the aberrant flow is not clearly definable by oxygen studies.'-8 When used according to any one of the several described methods, in addition to superior sensitivity and immediate recognition of a shunt, it o...
Extensive clinical use has now been made of the nitrous oxide test for the detection and localization of left-to-right circulatory shunts. On theoretical grounds the magnitude of such a shunt should be related to the systemic and pulmonary arteriovenous differences in nitrous oxide content measured early in the period of inhalation. In order to determine the validity of the nitrous oxide method...
Extensive clinical use has now been made of the nitrous oxide test for the detection and localization of left-to-right circulatory shunts. On theoretical grounds the magnitude of such a shunt should be related to the systemic and pulmonary arteriovenous differences in nitrous oxide content measured early in the period of inhalation. In order to determine the validity of the nitrous oxide method...
Migraine is a common neurological disorder with a great impact on the quality of life and social activities. Pulmonary arteriovenous malformations (PAVMs) are mostly congenital, with a prevalence of 5-50% in patients with hereditary hemorrhagic telangiectasia (HHT). A high prevalence of PAVMs is found in patients with HHT and migraine. Embolization of PAVMs seems to decrease the prevalence of m...
(A) Before the procedure, large residual ventricular septal shunts could be seen between the occluder and the peak of apex (Online Video 1). (B) After the procedure, the shunts decreased significantly (Online Video 2). LV 1⁄4 left ventricle; RV 1⁄4 right ventricle. A 58-year-old man with exertional dyspnea (New York Heart Association class II) was admitted to our hospital. He suffered from acut...
The ratio of pulmonary to systemic vascular resistance (Rp/Rs) largely determines the amount of left-to-right shunting and pulmonary to systemic flow rat (Qp/Qs) in the presence of a large isolated ventricular septal defect. The possibility that pharmacologic reduction of systemic vascular resistance with alpha-adrenergic receptor blockade or beta-adrenergic receptor stimulation would increase ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید