Abstract
Single cardiac Ca channels exhibit three modes of gating, expressed as current records with brief openings occurring in bursts (mode 1), records with long-lasting openings and very brief closings that appear only rarely (mode 2), and records that lack openings because of channel unavailability (mode 0). The dihydropyridine Ca agonist Bay K 8644 enhances Ca channel current by promoting mode 2, while the Ca antagonists nitrendipine and nimodipine reduce the current by favoring mode 0.
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Hess, P., Lansman, J.B., Tsien, R.W. (1985). Mechanism of Calcium Channel Modulation by Dihydropyridine Agonists and Antagonists. In: Fleckenstein, A., Van Breemen, C., Gross, R., Hoffmeister, F. (eds) Cardiovascular Effects of Dihydropyridine-Type Calcium Antagonists and Agonists. Bayer-Symposium, vol 9. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-70499-4_3
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DOI: https://doi.org/10.1007/978-3-642-70499-4_3
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