The effect of induced hypocalcaemia on the cardiac output and blood pressure of dairy cattle.
A mean reduction of plasma calcium level to 51 per cent of normal infusion of 4.7 per cent Na2EDTA solution into four cows was associated with a mean reduction of 48 per cent in cardiac output. Hypocalcaemia sufficient to produce sternal recumbency in a further four cows resulted in a highly significant fall in the mean arterial blood pressure, which returned to normal immediately after treatment with an intravenous infusion of 350 ml of 32.5 per cent calcium borogluconate.
D000818:Animals; D001794:Blood Pressure; D002302:Cardiac Output; D002339:Carotid Arteries / Q000503:physiopathology; D002417:Cattle; D002418:Cattle Diseases / Q000503:physiopathology*; D005260:Female; D006996:Hypocalcemia / Q000503:physiopathology / Q000662:veterinary*