Table III.

Effects of opioid receptor agonist on cardiac coronary flow, ml (n=15 rats per group; mean ± standard deviation).

Groups	30–35 min	35–40 min	70–75 min	75–80 min	110–115 min	115–120 min
Control	56.60±3.42	56.07±3.33	55.13±3.00	54.47±2.42	54.53±3.27	54.13±3.54
Ischemia	55.93±4.43	54.73±3.15	32.00±4.61	31.87±3.87	32.20±3.61	31.27±4.91
Remifentanil	56.73±4.86	55.87±4.26	54.93±4.64a	53.87±5.17a	53.53±5.14a	52.47±5.67a
Naloxone	57.73±4.27	57.67±3.98	32.73±2.99	32.87±3.85	32.40±4.00	32.20±3.90
Remifentanil + naloxone	56.93±3.77	56.53±3.46	33.20±2.54	33.27±1.71	33.93±2.58	33.67±2.85

^aP<0.05 vs. the ischemia, naloxone and remifentanil + naloxone groups.