Fig. 3.

Myocardial emergence functions for xenon over a threefold range of flows in a blood-perfused dog heart. The time axis is normalized by multiplying by F/W, flow divided by heart weight, and the ordinate η(t) is appropriately scaled reciprocally. The flows for each of the curves are indicated by the listing from above downward at the arrow. Those recorded at the lowest flows (dotted lines = F/W < 1.0 ml g−1 min−1) gave the high emergence rates at early times, suggesting shunting, while those at higher flows (continuous lines = F/W > 1.0) had later but lower peaks and were grouped more closely together indicating a more precise dependence on flow alone, that is, less diffusional shunting.