Abstract
Most of the studies of myocardial oxygen tensions (PmO2) that have been performed in the beating heart have been carried out in dogs (Rude et al 1982, Rude et al 1984, Moss 1968, Schuchhardt 1985, Reyes et al 1978, van der Laarse 1978). This species is known to have a number of microscopic collateral vessels in contrast to humans and pigs that have few such structures (Berne and Rubio 1979). As far as we are aware, no studies have been performed to determine the distribution of PmO2 values in the myocardium of the pig. Neither have studies been made of minute-to-minute changes in PmO2 distribution during conditions of acute myocardial ischemia. This paper reports our work in these areas.
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