Brady R Walker

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OBJECTIVE To assess whether use of oral glucocorticoids is associated with cardiovascular and cerebrovascular morbidity. DESIGN AND SETTING Nested case-control study within a cohort of patients (> or = 50 years old) with at least one prescription for oral or non-systemic glucocorticoids. Data were from the general practice research database. PATIENTS 50(More)
The relative performance of three analgesic rating scales--visual pain analog, verbal pain intensity, and verbal pain relief--was assessed in clinical trials with 1,497 patients and a variety of pain models. The scales correlated strongly with one another, with inconsistent and generally minimal differences in sensitivity. Overall, the verbal relief scale(More)
Experiments were performed on conscious chronically instrumented rats to determine the contribution of peripheral V2-vasopressinergic receptors in any alteration of baroreceptor reflex (BRR) sensitivity on release from 1 wk of 30 degrees head-down tilt resulting from tail suspension. Initial experiments determined changes in plasma volume (PV) occurring(More)
Clinical studies suggest that sleep apnea causes systemic hypertension. In addition, patients with sleep apnea have elevated plasma levels of endothelin-1 (ET-1). We hypothesized that the intermittent hypoxia/hypercapnia (IH) associated with sleep apnea causes hypertension by increasing ET-1 production. To test this hypothesis, rats with arterial and venous(More)
We have previously demonstrated that arterial, but not venous, vasodilatory responses to endothelium-derived nitric oxide (EDNO)-dependent agonists are enhanced in lungs isolated from rats with chronic hypoxia (CH)-induced pulmonary arterial hypertension. These data suggest that CH is associated with increased endothelial nitric oxide synthase (eNOS)(More)
Female rats develop less severe pulmonary hypertension (PH) in response to chronic hypoxia compared with males, thus implicating a potential role for ovarian hormones in mediating this gender difference. Considering that estrogen upregulates endothelial nitric oxide (NO) synthase (eNOS) in systemic vascular tissue, we hypothesized that estrogen inhibits(More)
Effects of renal insufficiency and age on oxazepam kinetics were assessed in 13 normal subjects (21 to 72 yr old), four patients with renal insufficiency, and eight patients on hemodialysis. Normal intact oxazepam results were: mean elimination half-life (t1/2), 10 hr; area under the curve (AUC), 6.0 microgram.hr/ml; unbound oxazepam fraction (fup), 3.2%;(More)
PURPOSE Surgical management of steroid unresponsive testicular tumors of the adrenogenital syndrome has been orchiectomy. Magnetic resonance imaging (MRI) of these tumors accurately delineates the extent of disease. Testis sparing surgery is an important consideration, since male individuals with congenital adrenal hyperplasia are potentially fertile. We(More)
Experiments were performed to determine the possible direct effects of arginine vasopressin (AVP) on cardiac function in the nonworking Langendorff preparation. Hearts were isolated from male Wistar rats, and the coronary arteries were retrograde perfused at a constant rate through the aorta with a Krebs-Henseleit solution, which was continuously bubbled(More)
Chronic hypoxia (CH) attenuates systemic vasoconstriction to a variety of agonists in conscious rats. Recent evidence suggests that similarly diminished responses to vasoconstrictors in aortic rings from CH rats may be due to increased endothelial heme oxygenase (HO) activity and enhanced production of the vasodilator carbon monoxide (CO). Thus we(More)