Table 1 The comparison of action potential parameter values between the open circle (the leading pacemaker site) and the open triangle (the region of maximum phase-4 slope) in Fig. 4c (n = 9)
|  | Slopes (−ΔF/F%/s) | APD50 (ms) | |
|---|---|---|---|
Phase 0 | Phase 4 | ||
Open circle | 9641 ± 131 | 19.0 ± 1.9 | 44.7 ± 0.5 |
Open triangle | 5381 ± 103* | 85.5 ± 4.9* | 75.6 ± 0.4* |