Fig. 6. Midazolam increases the coronary flow response to adenosine endogenously released during global hypoxia. (A ) Representative example of tracings of the coronary flow response in the absence and presence of midazolam (MDZ) from a single heart. (B ) Summarized data for six experiments as shown in (A ). The flow increase was measured as the area under the flow–time curve. Atrioventricular conduction was not significantly affected, as shown in the example in (C)  and the summary data in (D ). Summary data are expressed as mean ± SD;P < 0.05 compared with *control and †MDZ (5 μM).