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. Author manuscript; available in PMC: 2011 Apr 1.
Published in final edited form as: Circ Arrhythm Electrophysiol. 2010 Jan 28;3(2):186–194. doi: 10.1161/CIRCEP.109.928820

Table 1.

Functional Properties of Cntn2-EGFP− and Cntn2-EGFP+ myocytes

Action Potential Characteristics Ca2+ Transient Kinetics
Cell Type RMP (mV) APA (mV) APD50 (ms) APD90 (ms) Time to Max (ms) Peak Rate of Rise (F/Fo/s) Tau of decay (ms)
EGFP(−) (n=10) −71.3±1.1 119.2±3.2 5.5±0.9 54.7±9.7 29.5±3.6 103.0±20 110.4±13.4
EGFP(+) (n=10) −71.5±1.3 128.3±3.7 24.7±4.3 139.3±17.8 49.4±4.8 49.4±5.9 136.7±23.2
P value .87 .08 .00035 .00057 < .000001 < .00001 0.02

Data are expressed as mean values ± SEM. N, number of cells; RMP, resting membrane potential; APA, AP amplitude; APD50,90, AP duration at 50% and 90% of repolarization, respectively. APDs are significantly longer for Cntn2-EGFP+ myocytes compared to Cntn2-EGFP− myocytes. Ca2+ transient measurements demonstrated that Cntn2-EGFP+ myocytes have significantly slower Ca2+-handling kinetics compared to Cntn2-EGFP− myocytes.