Research Article
The Differential Effects of a Selective Kappa-Opioid Receptor Agonist, U50488, in Guinea Pig Heart Tissues
Figure 1
Effect of U50488 on the contractile force in guinea pig atria and ventricle. Sinoatrial node of right atrium was removed. Atria and ventricle were paced at 2 Hz. After equilibrium for 30 min, U50488 and norBNI were added sequentially. (a) Left atrium. (b) Right atrium. (c) Right ventricle.
(a) Left atrium |
(b) Right atrium |
(c) Right ventricle |