1. Volume 6, Issue 11, (November 2009)
Erratum 
Heart Rhythm 
Volume 6, Issue 11, (November 2009)
DOI: /j.hrthm
Copyright © Terms and Conditions

2. Figure 4
Endocardial tissue was studied in vitro. Zero line, voltage, and time calibration are indicated. A: Isoproterenol (5 × 10−7 M) and rapid pacing produces a single TA complex (upward arrow points to the TA), and downward arrow indicates DAD. B: Isoproterenol and Tempo with the same pacing protocol; no TA was observed although DAD is still present. C: With 15-minute washout, 3 TAs were again induced.
Heart Rhythm 2009 6, DOI: ( /j.hrthm )
Copyright © Terms and Conditions

3. New figure
(above): Recordings in standard electrolyte solution (in vitro) without isoproterenol from an excised ischemic site (Purkinje cell) with horizontal zero lines and voltage and time calibrations (different for A and B vs C and D). A: Sustained triggered activity (TA) is induced with rapid pacing (last stimulated indicated by the upgoing arrow). B: TA of 10 complexes produced by pacing despite superfusion with TEMPO 10−4 M. Note the last complex of TA is preceded by a delayed afterdepolarization (DAD) and after the TA a small DAD (downgoing arrow) occurs without achieving threshold. Not shown are similar data with TEMPO 10−3 M. C: No TA induced with TEMPO 10−2 M but spontaneous phase 4 depolarization achieves threshold. D: TA (one) and DAD again observed after 20 minutes wash out of TEMPO.
Heart Rhythm 2009 6, DOI: ( /j.hrthm )
Copyright © Terms and Conditions