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Phosphodiesterase type 5 inhibition is a novel therapeutic option in Raynaud disease.

BACKGROUND: Raynaud disease (RD) is a common disorder affecting 3% to 5% of the healthy population, and occurs in more than 90% of patients with connective tissue diseases. The therapeutic options remain limited, particularly in patients with secondary RD due to connective tissue disease. Theoretical considerations lead to the expectation that phosphodiesterase type 5 inhibitors may improve clinical symptoms and digital blood flow in patients with RD. METHODS: We conducted an open-label pilot study in 40 patients with RD, 33 (82%) of whom had secondary and 7 (18%) of whom had primary RD. Digital blood flow was measured by laser-Doppler flowmetry at room temperature and during the cold-exposure test before medical treatment, 1 hour after the initial intake, and after 2 weeks of continuous treatment (10 mg twice a day) with the novel phosphodiesterase type 5 inhibitor vardenafil. Clinical symptoms were recorded by a patient questionnaire and summarized as the Raynaud condition score. RESULTS: Laser-Doppler flowmetry revealed that vardenafil improved digital blood flow in 28 (70%) patients, whereas 12 (30%) did not respond. In individuals responding, digital blood flow significantly increased by a mean +/- SEM of 21.0% +/- 4.9% and 30.0% +/- 5.7% at 1 hour and 2 weeks of treatment at room temperature, respectively, and by 18.8% +/- 4.4% and 35.1% +/- 7.5% at 1 hour and 2 weeks during the cold-exposure test, respectively (P < .01 for all). Consistently, clinical symptoms improved in 27 (68%) of the 40 patients, and the Raynaud condition score declined from a mean +/- SEM of 5.05 +/- 0.38 to 3.54 +/- 0.31 (P < .001). CONCLUSION: Our data indicate that phosphodiesterase type 5 inhibition significantly improves peripheral blood flow and clinical symptoms in a large subset of patients with RD and, thus, may provide a novel therapeutic approach in such individuals.

3',5'-Cyclic-GMP Phosphodiesterases↗

Increased prevalence of migraine and chest pain in patients with primary Raynaud disease.

OBJECTIVE: To investigate the prevalence of headaches and recurrent chest pain in patients with primary Raynaud disease. DESIGN: Postal survey. SETTING: Raynaud disease clinic at the Lahey Clinic Medical Center, a tertiary care hospital. PARTICIPANTS: A consecutive series of 120 patients with primary Raynaud disease who had been observed for at least 2 years, 97 of whom received and 93 of whom completed the questionnaire, and a control group of 93 age- and sex-matched hospital employees without Raynaud phenomenon. RESULTS: Migraine was diagnosed in 57 (61%) patients with primary Raynaud disease and in 21 (23%) of the control group (odds ratio, 5.4; 95% CI, 2.8 to 10.3). Migraine with aura and migraine without aura were more common in patients with Raynaud disease than in the control subjects (27% compared with 5%; P less than 0.001 and 34% compared with 17%; P = 0.008, respectively). Nonmigrainous headaches were more common in the control group (51% compared with 25%; P = 0.003). Chest pains were reported by 44 (47%) of the patients with Raynaud disease and by 15 (16%) of the control group (odds ratio, 4.4; CI, 2.4 to 9.3). Chest pains were more frequently reported by patients with Raynaud disease who had migraine (34 of 57, 60%) than by patients without migraine (10 of 36, 28%; P = 0.003). CONCLUSIONS: An increased prevalence of migraine was found in patients with primary Raynaud disease. Chest pain, often diagnosed as musculoskeletal or nonspecific, was common in patients with primary Raynaud phenomenon, especially in patients who had coexisting migraine.

Adult↗

[The blood-flow in hands with Dupuytren's contracture and Raynaud disease: functional and morphological studies (author's transl)].

Concerning the question whether a correlation between the vasospasm and morphological changes in the neuro-myo-arterial glomerular (Hoyer-Grosser-Organ) exists also in Dupuytren disease, a series of 18 patients with Dupuytren and 5 patients with Raynaud disease were studied by finger venous occlusion plethysmography and finger tip biopsies. No typical histological changes were found in Dupuytren's Contracture, particularly none in the 13 cases (70%) which had a latent vasospasm and none in the 5 cases (30%) which had a normal plethysmogram, whereas in all the patients with Raynaud disease the typical morphological changes of wall, lumen and morphometric counts of the "Suquet-Hoyer" canals were found in correspondance to the abnormal plethysmogram. According to these results the vasospasm of Dupytren and Raynaud disease seems to be pathogenetically different.

Blood Circulation↗

Mechanisms of Raynaud's disease.

Raynaud's phenomenon is due to transient cessation of blood flow to the digits of the hands or feet. An attack of Raynaud's phenomenon is classically manifested as triphasic color changes. The white phase is due to excessive vasoconstriction and cessation of regional blood flow. This phase is followed by a cyanotic phase, as the residual blood in the finger desaturates. The red phase is due to hyperemia as the attack subsides and blood flow is restored. An attack is frequently associated with pain and/or paresthesia due to sensory nerve ischemia. Variants of Raynaud's phenomenon include acrocyanosis and primary livedo reticularis, each of which is associated with reduced skin blood flow, exacerbated by cold or emotional upset. Raynaud's phenomenon in the absence of other disorders is primary Raynaud's phenomenon, or Raynaud's disease. The mechanisms of Raynaud's disease include increased activation of the sympathetic nerves, in response to cold or emotion; an impaired habituation of the cardiovascular response to stress may contribute. In addition, there appears to be a local fault, which is likely multifactorial. This local fault is due to an alteration in vascular function rather than vascular structure. The alteration in vascular function may be related to increased sensitivity to cold of the adrenergic receptors on the digital artery vascular smooth muscle. In some cases, locally released or systemically circulating vasoconstrictors may participate, including endothelin, 5-hydroxytryptamine and thromboxane. A deficiency or increased degradation of nitric oxide, possibly due to increased oxidative stress, may be involved in some cases. These recent pathophysiological insights may lead to new therapeutic options.

Endothelins↗

High resolution 3 Tesla contrast-enhanced MR angiography of the hands in Raynaud's disease.

Raynaud's disease is associated with disorders in blood circulation of the hands. The gold standard to visualise pathology of digital arteries is catheter angiography. Contrast-enhanced MR angiography (CE MRA) has developed even more as an alternative non-invasive method to digital subtraction angiography, mostly for pelvic or lower limb vessels. We report a case of primary Raynaud's disease with high-grade stenosis and an occlusion of the digital arteries. This case illustrates the benefit and efficiency of CE MRA at high fields in depicting location and extension of peripheral arterial alterations.

Adult↗

Role of digital artery adrenoceptors in Raynaud's disease.

Raynaud's disease is characterized by excessive cutaneous vasoconstriction in response to ambient cold. A functional disturbance in the local regulation of digital vasomotion has been proposed. The purpose of this study was to determine whether there is an alteration in the postjunctional adrenergic receptors in the digital circulation of patients with Raynaud's disease. Furthermore, we sought to determine whether this abnormality was responsible for the excessive cold-induced vasoconstriction in these patients. Finger blood flow was measured by strain-gauge venous occlusion plethysmography in 10 patients with Raynaud's disease and in 10 normal volunteers in a 22 degrees C room. Measurements of finger blood flow and mean systemic arterial pressure were made during intra-arterial infusions of the alpha 1-adrenergic antagonist, prazosin, or the alpha 2-adrenergic antagonist, yohimbine, at room temperature and during local cooling of the hand. Basal finger blood flow in normal subjects was significantly greater than that of patients (8.6 +/- 2.7 vs 1.7 +/- 0.5 ml/100 ml per min; normal vs Raynaud's subjects; p < 0.05). In normal subjects, either prazosin or yohimbine induced dose-dependent increases in finger blood flow. The maximal increase in finger blood flow induced by prazosin was significantly greater than that in response to yohimbine (29.2 +/- 10.1 vs 2.8 +/- 2.1 ml/100 ml per min; prazosin vs yohimbine; p < 0.05). By contrast, in the Raynaud's patients, prazosin or yohimbine induced maximal increases in finger blood flow that were not significant (7.1 +/- 1.8 vs 5.0 +/- 2.2 ml/100 ml per min; prazosin vs yohimbine; p = NS). The response to prazosin in Raynaud's patients was significantly less than that of the normal volunteers (p < 0.05). In normal subjects, during intra-arterial infusion of vehicle alone, cooling induced a 52.6 +/- 5.8% reduction in finger blood flow. This cold-induced vasoconstriction was blunted, but not qualitatively altered, by either adrenergic antagonist. In the Raynaud's patients, during the intra-arterial infusion of the vehicle, cooling induced a 68.2 +/- 7.8% reduction in finger blood flow. Infusion of either adrenergic antagonist blunted, but did not qualitatively alter, the response to cold. Finger blood flow is less in patients with Raynaud's disease than in normal subjects when studied in a 22 degrees C room. In normal subjects, postjunctional alpha 1-adrenergic receptors appear to predominate in the control of digital vasoconstriction. Postjunctional alpha 1- and alpha 2-adrenoceptors play an equal role in adrenergic regulation of finger blood flow in patients with Raynaud's disease. In both normal and Raynaud's subjects, selective antagonism of alpha 1- or alpha 2-adrenergic receptors does not abolish local cold-induced vasoconstriction. Therefore, it is likely that a nonadrenergic mechanism contributes to local cold-induced vasoconstriction.

Adrenergic alpha-Antagonists↗

Effect of indoramin on finger circulation in patients with Raynaud disease.

The effect of indoramin was investigated on finger circulation in 20 patients with primary Raynaud disease. After placebo run-in, indoramin (50 mg t.i.d. per os) and placebo were given double-blind and in randomized order, each for 6 (protocol 1) and 3 weeks (protocol 2). No significant changes in blood pressure and heart rate were observed. Finger blood flow, measured with venous occlusion plethysmograph, increased significantly (p less than 0.025) with indoramin as compared with placebo, and local calculated resistance decreased when measured at room temperature (protocol 1). In protocol 2 flow was measured at the end of a 6-min contact with water temperature of 40, 30, 20, 10 and 5 degrees C, respectively. It was shown that the difference between indoramin and placebo was largest at high temperatures and was clearly decreased at lower temperatures. Thus, the present data objectively document that indoramin is capable of favorably influencing skin circulation, but this effect is less pronounced at lower temperatures.

Blood Pressure↗

[Biofeedback treatment of Raynaud's disease].

Raynaud's disease is characterized by intermittent peripheral vasoconstriction leading to pallor, cyanosis and reactive vasodilation of the arterioles of fingers and toes. These phenomena are accompanied by sensations of cold or warmth, pain and difficulty in manipulating the palms. Ulcerations of the fingertips can occur in severe cases. Since conservative medical treatment, consisting of preventive measures and changing various habits, results in alleviation in only half the patients, sympathectomy is often required. Psychological intervention, including biofeedback, also has a significant role. Biofeedback involving relaxation techniques, guided imagination, and in parallel, computer-assisted monitoring of sympathetic arousal, might lead to symptom reduction as a unique treatment or in conjunction with other treatment modalities.

Adolescent↗

[Severe Raynaud disease of all four extremities].

A 64-year-old woman presented with a serious Raynaud's disease affecting all four extremities and resulting in fingertip necroses. The symptoms had initiated after her second pregnancy in association with anorexia requiring treatment in a psychosomatic clinic and necessitating parenteral feeding. After successful sympatholysis a sympathectomy was performed. After initial success a recurrence in the right arm was treated by intraarterial prostaglandin infusion. This treatment brought a temporary benefit whereas intravenous infusions had been without effect. A further medical blockade of the stellate ganglion was followed by a complete disappearance of the symptoms. A subsequent re-operation was performed. Since all the cervical branches of the sympathetic nerve cord had been resected during the first intervention, a partial resection of the stellate ganglion (ganglion cervical inferior) was performed. There was a temporary benefit which lasted a few months. Medical long term treatment was unsuccessful. However, no further necroses occurred and the intermittent pain is tolerable.

Alprostadil↗

Raynaud disease with oral manifestations.

A young women with a history of Raynaud phenomenon, without underlying disease, manifested spasms of the tongue at times when the episodes of the hands were most severe. Striking changes in the appearance of the tongue occurred.

Adult↗