Effects of strontium ions on contraction and action potential in rabbit papillary muscles. A comparison with effects of tetraethylammonium ions.

The effects of Sr2+ on contraction and action potential were studied in rabbit papillary muscles and compared with effects of tetraethylammonium (TEA+). The membrane potential was measured with KCl-filled microelectrodes and the contraction was simultaneously recorded using a mechanoelectrical transducer. A partial (90%) substitution of extracellular Ca2… CONTINUE READING