The effect of different calcium antagonists and a calcium agonist on the metabolism of propranolol by isolated rat hepatocytes

Summary— The influence of the dihydropyridine calcium entry blockers nicardipine, amlodipine, nifedipine, isradipine and of the dihydropyridine calcium entry promotor BAY K 8644 on the disappearance rate of propranolol by isolated rat hepatocytes was compared to the effect of diltiazem and verapamil, two non-dihydropyridine calcium channel blockers and known inhibitors of hepatic cytochrome P450 mixed function oxidases. All compounds dose-dependently inhibited the disappearance rate of propranolol. Nicardipine and isradipine were more potent in inhibiting the disappearance rate of propranolol than the other dihydropyridines and than diltiazem and verapamil. The inhibitory effect of nicardipine on the disappearance rate of propranolol was not stereoselective and was not influenced by age.     

Subclinical manifestations of autoimmune rheumatic diseases in primary Raynaud's phenomenon

Twenty-nine patients with primary Raynaud's phenomenon underwent functional (pulmonary functional studies and oesophageal manometry), histologic (minor salivary gland biopsy) and serologic (autoantibodies) evaluation for subclinical manifestations of autoimmune rheumatic disease (ARD). Seven (24%) has strong evidence and eight (27%) possible evidence of ARD. All patients with strong evidence of ARD had Raynaud's phenomenon with a duration of less than five years. This study suggests that such manifestations are frequent in patients wih primary Raynaud's phenomenon and can be detected with non-aggressive methods which should be used early in the course of their disease.     

Patterns of femoral head migration in osteoarthritis of the hip: a reappraisal with CT and pathologic correlation

Although medial, superior, and axial patterns of migration of the femoral head in osteoarthritis of the hip have been well described, it is not clear what anatomic and biomechanical factors determine the direction of migration. The authors studied 22 patients with bilateral (11 patients) or unilateral (11 patients) osteoarthritis by means of conventional radiography and computed tomography (CT) to define any relationships between migration in the coronal plane and that in the transverse plane and to determine whether femoral anteversion, acetabular anteversion, femoral neck-shaft angle, or acetabular inclination were related to particular migration patterns. Anterior migration was evident in 14 of the 19 hips with a superior migration pattern, whereas posterior migration was present in five of the seven hips with a medial migration pattern. In the remainder of cases, no migration in the transverse plane was present. Femoral anteversion as determined with CT, femoral neck-shaft angle, angle of acetabular inclination, and acetabular anteversion angle in this relatively small sample were all found to be within normal limits and appeared to have no influence on the occurrence of a specific pattern of femoral head migration.     

General practitioners' satisfaction with and attitudes to out-of-hours services

Background  

In recent years, Dutch general practitioner (GP) out-of-hours service has been reorganised into large-scale GP cooperatives. Until now little is known about GPs' experiences with working at these cooperatives for out-of-hours care. The purpose of this study is to gain insight into GPs' satisfaction with working at GP cooperatives for out-of-hours care in separated and integrated cooperatives.     

Leukaemic synovitis

A 75-yr-old female, previously diagnosed as myelodysplasticsyndrome, presented with fever, migratory polyarthritis andpancytopenia. Physical examination revealed frank symmetricalarthritis, additive in character that involved knees and ankles.The examination of peripheral blood film did not disclose blastcells. Synovial     

Complete heart block in a patient with systemic sclerosis

We describe a patient with diffuse systemic sclerosis and presyncopal episodes where the electrocardiogram revealed complete atrioventricular heart block associated with left posterior and right heart bundle block. The patient underwent implantation of a permanent pacemaker.