Fig. 2. Comparative use-dependent effects of racemic bupivacaine, levobupivacaine, and ropivacaine on transverse conduction velocity (θT). Data are expressed as mean ± SD. All agents induced a significant use-dependent slowing of θT. The use-dependent effect was not different among agents (P = 0.07). PCL = pacing cycle length (in milliseconds).

Fig. 2. Comparative use-dependent effects of racemic bupivacaine, levobupivacaine, and ropivacaine on transverse conduction velocity (θT). Data are expressed as mean ± SD. All agents induced a significant use-dependent slowing of θT. The use-dependent effect was not different among agents (P = 0.07). PCL = pacing cycle length (in milliseconds).

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