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Figure 2 LABDA and HASDA

(A) High amplitude spike discharge activity (HASDA) induced couplets and abruptly increased heart rate 6 days after cessation of rapid pacing in dog #2. (B) Low amplitude burst discharge activity (LABDA) episodes associated with isolated premature ventricular contraction and couplets 1 day after cessation of rapid pacing in dog #3. (C) LABDA episodes associated with isolated premature ventricular contraction and triplets (ventricular tachycardia) 1 day after cessation of rapid pacing in dog #2. Abbreviations as in Figure 1.