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. Author manuscript; available in PMC: 2010 May 1.
Published in final edited form as: Heart Rhythm. 2009 Feb 14;6(5):644–651. doi: 10.1016/j.hrthm.2009.02.018

Table 3.

Comparison of sites with and without delayed enhancement

DE No DE
Number of sites (n) 855 905
Normal EGM 25/366 (7%) 341/366 (93%)
Abnormal EGM 408/926 (44%) 518/926 (56%)
Fractionated EGM 319/360 (89%) 41/360 (11%)
EGM with IPs 103/108 (95%) 5/108 (5%)
Critical VT sites 31/31 0/31
Bipolar voltage (mV) 0.74±0.84 3.05±2.58
Unipolar voltage (mV) 3.84±2.51 9.16±3.80
Electrogram width (msec) 119±69 80±31

Abbreviations: EGM= electrogram; IP= isolated potentials. The p values are all <0.0001.