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Figure 3 Shock success of triphasic (5/5/5 ms) and biphasic (5/5 ms) waveform shocks of equal-duration pulses at five intervals of actually delivered energy to the animals in parts II and III. Triphasic waveform shocks achieved higher success rates at the intervals of 40 to <50 J and 50 to <65 J (n = 27).