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70 results on '"G. J. Symons"'

1. Pulmonary endarterectomy for chronic thromboembolic pulmonary hypertension in Cape Town, South Africa

Author

S A Davies-van Es, T C Pennel, J Brink, G J Symons, and G L Calligaro

Subjects
Diseases of the respiratory system, RC705-779, Medical emergencies. Critical care. Intensive care. First aid, RC86-88.9
Abstract

Background. Pulmonary endarterectomy (PEA) is the only definitive and potentially curative therapy for chronic thromboembolic pulmonary hypertension (CTEPH), associated with impressive improvements in symptoms and haemodynamics. However, it is only offered at a few centres in South Africa. The characteristics and outcomes of patients undergoing PEA in Cape Town have not been reported previously. Objectives. To assess the difference in World Health Organization functional class (WHO-FC) before and at least 6 weeks after surgery. Methods. We interrogated the adult cardiothoracic surgery database at the University of Cape Town between December 2005 and April 2021 for patients undergoing PEA at Groote Schuur Hospital and a private hospital. Results. A total of 32 patients underwent PEA, of whom 8 were excluded from the final analysis owing to incomplete data or a histological diagnosis other than CTEPH. The work-up of these patients for surgery was variable: all had a computed tomography pulmonary angiogram, 7 (29%) had a ventilation/perfusion scan, 5 (21%) underwent right heart catheterisation, and none had a pulmonary angiogram. The perioperative mortality was 4/24 (17%): 1 patient (4%) had a cardiac arrest on induction of anaesthesia, 2 patients (8%) died of postoperative pulmonary haemorrhage, and 1 patient (4%) died of septic complications in the intensive care unit. Among the survivors, the median (interquartile range) improvement in WHO-FC was 2 (1 - 3) classes (p=0.0004); 10/16 patients (63%) returned to a normal baseline (WHO-FC I). Conclusion. Even in a low-volume centre, PEA is associated with significant improvements in WHO-FC and a return to a normal baseline in survivors.

Published
2023
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10. The Drought and the Urban Water Supply

Author

G. J. Symons

Subjects
Urban water supply, business.industry, General Engineering, MEDLINE, General Earth and Planetary Sciences, Medicine, General Medicine, Articles, business, Data science, Environmental planning, General Environmental Science
Published
2010

12. DISCUSSION. LOUGH ERNE DRAINAGE

Author

J Price, W Berrell, W B Tripp, R Hassard, L B Wells, G J Symons, J W Barry, Sir J Coode, R W P Birch, F G M Stoney, L F V Harcourt, J C Hawkshaw, and W Topley

Subjects
Hydrology, Hydrology (agriculture), Flooding (psychology), Drainage, Geology
Published
1890

13. DISCUSSION. MANCHESTER AND LIVERPOOL WATER-SUPPLY

Author

G J Symons, G F Deacon, G Farren, Sir G B Bruce, J Mansergh, A W Brightmore, G Molesworth, L B Wells, W B Lewis, D B Butler, J W M Watson, W C Unwin, C H Cooper, W Annor, G H Hill, E Sandeman, C Hawksley, L F V Harcourt, C H Beloe, A R Binnie, J W Barry, and Sir B Baker

Subjects
Cement, Engineering, business.industry, law, Water supply, Masonry, business, Civil engineering, Filtration, law.invention
Published
1896

14. DISCUSSION. THE CONSERVANCY OF RIVERS

Author

G E Eachus, G J Symons, J W Barry, Daw, J F Bateman, B Latham, J Abernethy, Sir J Coode, W H Wheeler, J B Redman, J C Hawkshaw, A Giles, H J Marten, Shelford, A Jacob, T Coote, C Tebbutt, and R B Grantham

Subjects
Hydrology, Geography, Flooding (psychology), Drainage
Published
1881

19. DISCUSSION. WIND-PRESSURE

Author

T Seyrig, R Field, B Baker, A A Langley, W H Barlow, G J Symons, E A Cowper, W C Unwin, C B Bender, W Airy, Sir W G Armstrong, M Amende, J B Redman, J.W. Peggs, J N Douglass, and H D Pearsall

Subjects
Engineering, Anemometer, business.industry, Venturi effect, Train, Geotechnical engineering, Storm, business, Bracing
Published
1881

20. DISCUSSION. THE WITHAM NEW OUTFALL CHANNEL AND IMPROVEMENT WORKS

Author

Sir G B Bruce, L F V Harcourt, J C Hawkshaw, G J Symons, J E Williams, A Giles, C A Hartley, H J Marten, A C Hurtzig, W Shelford, and F W Sheilds

Subjects
Hydrology, Outfall, Environmental engineering, Environmental science, Drainage, Silt, Communication channel
Published
1889

21. Jubilee address

Author

G. J. Symons

Subjects
Atmospheric Science
Published
1900

22. DISCUSSION. THE MAIN DRAINAGE OF LONDON AND PURIFICATION OF THE THAMES

Author

J W Barry, A B Mcdonald, Crimps, Sir L Williams, GM Taylor, Worth, A Angell, G J Symons, Andrew S. Jones, G S Woodhead, C H Cooper, W J Dibdin, B Latham, H Robinson, H A Roechling, Dupre, A R Binnie, J Lunt, W.H. Corfield, G Chatterton, B Ward, G R Strachan, Rideal, and B Blount

Subjects
business.industry, law, Sewerage, Stormwater, Outfall, Environmental engineering, Sewage, Environmental science, Drainage, business, Effluent, Filtration, law.invention
Published
1897

23. DISCUSSION ON RAINFALL, EVAPORATION AND PERCOLATION

Author

W H Wheeler, Dines, Topley, J Taylor, C Greaves, Taunton, Redman, T Fenwick, D T Ansted, G R Stephenson, R Field, Payne, Prestwich, Gilbert, Rawlinson, G J Symons, J C Clutterbuck, E J Lloyd, B Latham, Homersham, J Evans, Merrifield, E L Williams, and Shelford

Subjects
Hydrology, Percolation, Soil water, Evaporation, Environmental science
Published
1875

24. DISCUSSION. ON THE SUBTERRANEAN WATER IN THE CHALK FORMATION OF THE UPER THAMES, AND ITS RELATION TO THE SUPPLY OF LONDON

Author

SIR J COODE, J T HARRISON, G J SYMONS, J H GILBERT, J HOPKINSON, J LUCAS, S CRIMP, J C HAWKSHAW, T H BLAKESLEY, J EVANS, W WHITAKER, J MANSERGH, L FLOWER, F W SHEILDS, H ROBINSON, W TOPLEY, and M PIERCE

Subjects
Hydrology, business.industry, Percolation, Water supply, Geotechnical engineering, General Medicine, Drainage, business, Geology, Groundwater
Published
1891

27. DISCUSSION. THE MONT CENIS TUNNEL

Author

H Maudsley, E A Cowper, W W Evans, T Sopwith, G J Morrison, Bewick, W E Rich, G J Symons, Beaumont, and Sir W G Armstrong

Subjects
Mining engineering, law, Ventilation (architecture), Submarine, Drilling, Geotechnical engineering, Excavation, Underwater, Geology, law.invention
Published
1872

29. DISCUSSION. FRESH-WATER FLOODS OF RIVERS AND FLOODS IN NERBUDDA VALLEY. (INCLUDES PLATE)

Author

G J Symons, R P Brereton, C B Vignoles, R Manning, J M Heppel, G P Bidder, J Brunton, G H Phipps, J F Bateman, J T Smith, A H Vaux, E R James, Beardmore, F Fowler, W Parkes, R Hassard, C Curtis, J B Redman, W Denison, C H Gregory, H Law, A A West, Ansted, J C Clutterbuck, and R W Graham

Subjects
Hydrology, geography, geography.geographical_feature_category, Floodplain, Fresh water, Drainage, Surface runoff, Geology
Published
1867

33. DISCUSSION. ON ENGINEERING PHILOSOPHY : THE DURABILITY OF MATERIALS

Author

C B Vignoles, E Clark, W H Barlow, T Marr Johnson, E B Webb, T M Johnson, J M Heppel, H Conybeare, S B Boulton, G J Symons, G Farren, Shoolbred, A Giles, Beardmore, J W Bazalgette, and H S Bethell

Subjects
Materials science, Metallurgy, Forensic engineering, Durability, Rust, Corrosion
Published
1867

35. CORRESPONDENCE. WATERWORKS IN CHINA AND JAPAN

Author

J H T Turner, H S Palmer, T Walker, G J Symons, and E Perrett

Subjects
Service (business), Geography, law, business.industry, Environmental engineering, Water supply, Water resource management, China, business, Filtration, law.invention
Abstract

n/a

Published
1890

36. DISCUSSION. FIXED AND MOVABLE WEIRS; MOVABLE DAMS IN INDIAN WEIRS

Author

L F V Harcourt, L B Wells, Sir C Hartley, W Parkes, G Higgin, Pearson, B Bell, J B Redman, F G M Stoney, H G Harris, W C Unwin, R Rawlinson, G J Symons, J A Longridge, B Latham, and R B Buckley

Subjects
Engineering, business.industry, Geotechnical engineering, Silt, business, Civil engineering, Siltation
Published
1879

38. DISCUSSION. ON THE NAGPUR WATERWORKS

Author

Bateman, T Ormiston, W R Johnson, Sir G B Airy, Greaves, S Brookes, F Cotton, S C Homersham, G J Symons, R Aitken, Binnie, Harrison, R Field, H F Blandford, G Dines, Sir G Campbell, and A Strange

Subjects
Hydrology, Geography, business.industry, Evaporation, Tropics, Water supply, business
Published
1874

40. DISCUSSION ON IMPOUNDING RESERVOIRS

Author

G J Symons, A W Brightmore, L F V Harcourt, J Mansergh, B Latham, G F Deacon, C Hawksley, W C Unwin, W J B Clerke, S S Jacob, Kreuter, R Hassard, W Shelford, Sir B Baker, R Aitken, Sir G Molesworth, and A R Binnie

Subjects
Cement, Stress (mechanics), business.industry, Evaporation, Water supply, Geotechnical engineering, Masonry, business, Geology
Published
1894

42. On a white rain or fog bow

Author

G. J. Symons

Subjects
Atmospheric Science, Fog bow, White (horse), Meteorology, Geology
Published
1874

43. The Brontometer

Author

G. J. SYMONS

Subjects
Multidisciplinary
Published
1890

44. Periodicity of Rainfall

Author

G. J. Symons

Subjects
Variable (computer science), Multidisciplinary, Meteorology, Locality, Single station, Mathematics
Abstract

As far as my own figures are concerned, the reply to Mr. Meldrum's question is very easily afforded. I agree with him that it is undesirable to use averages deduced from groups of stations variable both in the number and locality of their components. The observations which I quoted were those of a single station, Halton, St. Philip, Barbadoes.

Published
1872

48. A Fragment of the Geography of England. South-West Sussex: Discussion

Author

Charles Wilson, Colonel Johnston, Prof. Lapworth, J. E. Marr, Major Craigie, G. G. Chisholm, G. J. Symons, and Dr. Mill

Subjects
Geography, Fragment (computer graphics), Geography, Planning and Development, Archaeology, Earth-Surface Processes
Abstract

n/a

Published
1900

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