Table 2.

Relative increases in the antiarrhythmic-induced gA channel appearance frequencies and lifetimes

gA single-channel properties Amiodarone Dronedarone Propranolol Pindolol 
3 µM 10 µM 0.3 µM 1 µM 3 µM 100 µM 300 µM 1,000 µM 100 µM 300 µM 1,000 µM 
f13/f13cntrl 2.5 ± 0.7 6.5 ± 0.3 2.1 ± 0.1 4.2 ± 1.2  1.6 ± 0.4 4.4 ± 0.3 3 ± 1 4.0 ± 1.2 
f15/f15cntrl 3.1 ± 0.5 3.6 ± 1.2 1.7 ± 0.03 2.2 ± 0.7  1.8 ± 0.6 6.5 ± 0.2 11 2.2 ± 0.4 3.4 ± 1.1 
τ1313cntrl 1.6 ± 0.2 3.5 ± 0.2 1.5 ± 0.1 2.2 ± 0.2 4.6 ± 0.8 1.1 ± 0.1 1.2 ± 0.03 1.8 ± 0.2 1.0 ± 0.1 1.1 ± 0.1 1.4 ± 0.3 
τ1515cntrl 1.5 ± 0.3 2.3 ± 0.04 1.2 ± 0.1 1.6 ± 0.3 3.0 ± 0.8 1.0 ± 0.05 1.1 ± 0.1 1.4 ± 0.02 1.1 ± 0.1 1.2 ± 0.2 1.3 ± 0.1 
gA single-channel properties Amiodarone Dronedarone Propranolol Pindolol 
3 µM 10 µM 0.3 µM 1 µM 3 µM 100 µM 300 µM 1,000 µM 100 µM 300 µM 1,000 µM 
f13/f13cntrl 2.5 ± 0.7 6.5 ± 0.3 2.1 ± 0.1 4.2 ± 1.2  1.6 ± 0.4 4.4 ± 0.3 3 ± 1 4.0 ± 1.2 
f15/f15cntrl 3.1 ± 0.5 3.6 ± 1.2 1.7 ± 0.03 2.2 ± 0.7  1.8 ± 0.6 6.5 ± 0.2 11 2.2 ± 0.4 3.4 ± 1.1 
τ1313cntrl 1.6 ± 0.2 3.5 ± 0.2 1.5 ± 0.1 2.2 ± 0.2 4.6 ± 0.8 1.1 ± 0.1 1.2 ± 0.03 1.8 ± 0.2 1.0 ± 0.1 1.1 ± 0.1 1.4 ± 0.3 
τ1515cntrl 1.5 ± 0.3 2.3 ± 0.04 1.2 ± 0.1 1.6 ± 0.3 3.0 ± 0.8 1.0 ± 0.05 1.1 ± 0.1 1.4 ± 0.02 1.1 ± 0.1 1.2 ± 0.2 1.3 ± 0.1 

Values represent relative changes in gA channels’ single-channel appearance frequencies (f) and lifetimes (τ), where f or τ in the presence of antiarrhythmics is normalized to that in the absence of antiarrhythmic in the same experiment.

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