the potency of putative blockers ( lidocaine , dantrolene na , dan , skf 525a ) for various forms of ca2+ release from sarcoplasmic reticulum ( sr ) against two types of spontaneous contractions induced by 0.5 mm caffeine ( caffeine response ) or myocardium ca2+ overload ( after-contractions ) was tested in rat papillary muscle .
C0027061
myocardium
C0030352
papillary