To assess prevailing guidelines for the oximetric detection of intracardiac left-to-right shunts, we examined the variability of right heart oxygen saturation step-ups in 1121 catheterisations in children with aortic and pulmonary stenosis, who were studied as part of the joint study of the natural history of congenital heart defects. It is estimated that in the absence of intracardiac shunting...

Pericardial pressure was measured in 18 patients undergoing cardiopulmonary bypass for up to 10 days using a solid state transducer. Mean and phasic pericardial pressure wave forms were similar to those reported in animals. A wide range of mean pressure from 0 to 30 mmHg was recorded, and values of up to 20 mmHg were observed in patients whose postoperative clinical course was uncomplicated. Fl...

1. The unfertilized eggs of Fucus vesiculosus, in the dark, consume about 5.2 mm.(3) O(2) per hour per 10 mm.(3) eggs. 2. With an illumination of 100,000 foot candles in photosynthesis they liberate more than twice as much oxygen as they consume. 3. The actively swimming antherozoids or sperm of Fucus consume oxygen at a very high rate: 25.5 mm.(3) O(2) per hour per 10 mm.(3) antherozoids. 4. I...

SIRs,-In your April issue (Brit. J. Ophthal., 1965, 49, 205) you published my paper "Applanation Tonometry using One Drop of an Anaesthetic-Fluorescein Mixture". This paper recommended a mixture containing 0 3 per cent. Novesine and 0)125 per cent. fluorescein; one drop gave good corneal anaesthesia and a good fluorescent ring for Goldmann applanation tonometry. Of the eight anaesthetic solutio...

Anesthetized dogs were cooled to a core body temperature of 26 degree C. or maintained at a body temperature of 37 degree C. during periods of 5 and 10 hours of LAD coronary artery occlusion. Subsequent macroscopic dehydrogenase enzyme mapping showed that ischemic injury was 25 per cent less after 5 hours of coronary occlusion and 20 per cent less after 10 hours of occlusion in hypothermic dogs...

the cause of elevated diastoic blood pressure remains elusive in the majority of instanses, however in about 3-25 per cent of all hypertensive patients an specific causative factor such as renal can be identified. based upon our recent study, we believe that the incidence of renal hypertensions is quite high in our community with the esternate ranging from 10 to 4u per cent of all secondary hyp...