Canine congenital aortic stenosis: A review of the literature and commentary   总被引：2，自引：0，他引：2       下载免费PDF全文

O'grady MR  Holmberg DL  Miller CW  Cockshutt JR 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(10):811-815

Congenital aortic stenosis usually affects the subvalvular region, and occurs mainly in Newfoundland, Golden Retriever, German Shepherd, and Boxer dogs. The disorder is inherited as a dominant trait with variable penetrance in Newfoundland dogs.

The prevalence of subaortic stenosis-like heart murmurs in Golden Retriever dogs appears to be very much greater than previously suspected.

Most cases of aortic stenosis represent mild lesions, are detected as incidental findings, and result in no loss of longevity or quality of life. Moderate or severe stenosis may result in exertional weakness, syncope, or sudden death. Signs of congestive heart failure are rare unless mitral valve insufficiency is present.

Generally, electrocardiography and radiography are unrevealing in this disorder. Doppler echocardiography may be the best diagnostic tool to detect even mild cases of aortic stenosis.

At present, therapy is limited due to the technical expertise and expense required. The prognosis depends on the severity of the lesion.

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British Columbia. Incursion of bluetongue virus type 11 and epizootic hemorrhagic disease of deer type 2 for two consecutive years in the Okanagan Valley   总被引：1，自引：1，他引：0       下载免费PDF全文

Gc D  C D  Dj M  A A  Ea T  D W  W S 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(4):351

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Prince Edward Island. Coxiellosis in a kitten          下载免费PDF全文

Daoust PY  Perry R 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(5):434

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The association between pupil sizes and blood constituents in cows with parturient paresis          下载免费PDF全文

Fenwick DC 《The Canadian veterinary journal. La revue veterinaire canadienne》1989,30(5):426-429

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Effects of water deficit on flower opening in coffee (Coffea arabica L.)     

Crisosto CH  Grantz DA  Meinzer FC 《Tree physiology》1992,10(2):127-139

The response of coffee (Coffea arabica L.) floral buds to different water deficits followed by re-irrigation was investigated. Flower opening was stimulated by irrigation after one period of water deficit if predawn leaf water potential declined below -0.8 MPa. Similar stimulation of flowering was observed when less severe but more prolonged water deficits (ca. -0.3 to -0.5 MPa for two weeks) were imposed, even if water deficit was relieved by re-irrigation several times during this period. Consistent results were obtained in the field and in two greenhouse locations. Stimulation of flower opening by water deficit followed by re-irrigation was restricted to buds at the "open white cluster" stage of development (Stage 4). Only buds at this stage exhibited development of secondary xylem. Split-root experiments indicated that a root signal stimulated flower opening, independently of predawn or midday leaf water status. Frequent irrigation to prevent flowering, followed by a controlled water deficit and re-irrigation to stimulate flowering, may represent a practical method to synchronize flowering and shorten the harvest period in leeward coffee production areas in Hawaii.  相似文献   

Response: late permian extinctions     

Wignall PB  Twitchett RJ 《Science (New York, N.Y.)》1996,274(5292):1551b-1552b

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Response: AIDS and ethnicity     

Rosenberg PS 《Science (New York, N.Y.)》1996,271(5255):1480b-1481b

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Tokamak in India     

Kaw PK 《Science (New York, N.Y.)》1996,273(5277):861c

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Whistleblowers not polled     

McCutchen CW 《Science (New York, N.Y.)》1996,271(5257):1793

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Science in china     

Tso TC 《Science (New York, N.Y.)》1996,273(5281):1478b

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