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Biomedical subjects

J Watt

Publications and source records attributed to J Watt.

At least 109 records · Page 6Linked to original sources
PubMed1975

Ruptured sinus of Valsalva aneurysm with aortic-left atrial fistula.

We report the case of a previously healthy 56-year-old male who suddenly developed severe chest pain and pulmonary edema. Cardiac catheterization and angiography revealed an aneurysm of the noncoronary sinus of Valsalva which had ruptured into the left atrium. This was confirmed at operation and it was noted that there were no signs of bacterial infection or rheumatic valve disease. We therefore concluded that the aneurysm was of congential origin. A successful repair of the defect was carried out and the patient made a satisfactory recovery. There are only 3 other reported cases of rupture of a congenital sinus of Valsalva aneurysm into the left atrium, and in only one case did the aneurysm originate from the noncoronary sinus and this patient had associated rheumatic aortic and mitral valve disease. We have received the classification of sinus of Valsalva aneurysms, the associated congenital and acquired defects and the presenting features of unruptured and ruptured aneurysms.

Aortic Aneurysm↗
PubMed1975

Experimental ulcerative disease of the colon.

The oral administration to guinea-pigs of an aqueous solution of carrageenan derived from the red seaweed, Eucheuma spinosum, provides a useful, readily available experimental model for the study of ulcerative disease of the colon. Two types of ulcerative disease can be produced within a 4-6 week period, viz., ulceration localised mainly to the caecum by using 1% undegraded carrageenan in the drinking fluid, and extensive ulceration involving caecum, colon, and rectum by using 5% degraded carrageenan. Ulceration is probably due to the local action of carrageenan in the bowel.

Animals↗
PubMed1971

Carrageenan-induced ulceration of the large intestine in the guinea pig.

A 5% aqueous solution of degraded carrageenan derived from the red seaweed Eucheuma spinosum was fed to guinea pigs in their drinking water over a period of 20-45 days. Occult blood in the faeces and multiple ulcers in the caecum, colon and rectum occurred in 100% of animals by the 30th day. The clinical and pathological features bear a close resemblance to human ulcerative colitis. The method provides a simple experimental model for the study of various aspects of the pathology of ulcerative lesions in the large intestine as well as the effects of therapeutic agents.

Animals↗