Pharmacological characterization of the heartbeat in an extant vertebrate ancestor, the Pacific hagfish, Eptatretus stoutii
Keywords: HCN; Hyperpolarization-activated cyclic nucleotide-gated channel; VG; Voltage-gated; TTX; Tetrodotoxin; INaTTX; Tetrodotoxin-sensitive voltage-gated sodium current; ICa; Calcium current; If; Slowly depolarizing K+ and Na+ funny current; INa; Sodium curren