| 11. |
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| 12. |
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| 13. |
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| 14. |
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| 15. |
- Andersson, Staffan, et al.
(författare)
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24-hour electrocardiographic study in myotonic dystrophy
- 1988
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Ingår i: Cardiology. - : S. Karger AG. - 0008-6312 .- 1421-9751. ; 75:4, s. 241-249
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Tidskriftsartikel (refereegranskat)abstract
- Thirty-eight consecutive adult patients with myotonic dystrophy were included in a study with electrocardiography at rest and 24-hour ambulatory electrocardiography. The patients were subdivided into three groups according to the severity of the disease. The prevalence of abnormal electrocardiograms at rest was 31, 50 and 100% in patients with mild, moderate and severe disease, respectively. The main characteristics observed at ambulatory electrocardiography were a high frequency of sinus bradycardia (58%) and intermittent atrioventricular block II (8%). These bradyarrhythmias were not correlated to the severity of the disease. Sustained atrial fibrillation or flutter was found in 3 patients (8%), all with the most severe form of the disease. Ambulatory electrocardiography should be used deliberately in the evaluation of patients with myotonic dystrophy and symptoms compatible with cardiac arrhythmias.
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| 16. |
- Andersson, Staffan, et al.
(författare)
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Bladder wall relaxation and its dependency on transmural pressure and infusion rate during cystometry : in vivo studies in the rat
- 1988
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Ingår i: Urologia internationalis. - : S. Karger AG. - 0042-1138 .- 1423-0399. ; 43:3, s. 157-159
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Tidskriftsartikel (refereegranskat)abstract
- Cystometry at different infusion rates was performed in 7 rats in vivo. The bladders were furthermore allowed to relax from different transmural pressures. When distension of the bladder was moderate, relative relaxation was small and almost independent of transmural pressure and infusion rate. When distended to large volumes, however, there was a marked increase in bladder wall relaxation and the relaxation increased with increasing infusion rates. These findings indicate the importance of standardization of the cystometric procedure
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| 17. |
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| 18. |
- Andersson, Staffan, et al.
(författare)
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Twenty-four-hour electrocardiography in a healthy elderly population
- 1988
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Ingår i: Gerontology. - : S. Karger AG. - 0304-324X .- 1423-0003. ; 34:3, s. 139-144
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Tidskriftsartikel (refereegranskat)abstract
- Twenty-four hour electrocardiography was performed in fifteen 73-year-old and seventeen 82-year-old subjects without known cardiovascular disease. They were selected from a representative population of elderly people. All subjects showed supraventricular premature beats. Supraventricular tachycardia was seen in 63%. Eighty-four percent showed ventricular premature beats (VPBs), and more than two VPB configuration types were seen in 23% of the subjects. Episodes of intermittent atrial flutter and fibrillation, higher-degree atrioventricular blocks and ventricular tachycardia were absent or rare.
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| 19. |
- Andersson, Staffan, et al.
(författare)
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Wall mechanics of the rat bladder. I. Hydrodynamic studies in the time domain.
- 1988
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Ingår i: Acta Physiologica Scandinavica. - 0001-6772 .- 1365-201X. ; 134:4, s. 457-461
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Tidskriftsartikel (refereegranskat)abstract
- The hydrodynamic properties of the rat bladder in the collection phase were examined by slow continuous and very fast stepwise cystometry in nine rats. In vivo, the fast volume steps induced a reproducible detrusor contraction (type A) which remained after spinal anaesthesia and anticholinergic treatment, but ceased post-mortally within 1 h. No significant effect of anticholinergic treatment was found on bladder stiffness. The stiffness and relaxation time of the bladder wall increased markedly at large distension. At small and moderate distension, however, the compliances evaluated from continuous and stepwise cystometry were nearly the same, and a linear elastic model of the bladder was applicable. We consider that the rat bladder will be a useful experimental model in further research on viscoelasticity and instability of the bladder wall.
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| 20. |
- Andersson, Staffan, et al.
(författare)
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Wall mechanics of the rat bladder. II. Hydrodynamic studies in the frequency domain
- 1988
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Ingår i: Acta Physiologica Scandinavica. - 0001-6772 .- 1365-201X. ; 134:4, s. 463-466
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Tidskriftsartikel (refereegranskat)abstract
- The hydrodynamic properties of the urinary bladder in rat were examined by means of very small periodic changes in volume at different frequencies. The elastance increased with increasing frequency of volume changes, indicating the presence of viscoelastic elements. When the bladder was only moderately distended the influence of viscosity was minor. We consider that the rat bladder examined by this technique is an ideal experimental model for assessment of in vivo effects of pharmacological agents on bladder wall tonus. For example, cholinergic treatment showed a 100% increase in elastance and atropine inhibited this effect completely within 3 min.
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