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Enhanced GJ coupling regularizes VF to VT. Representative ECGs in response to (A) RTG (0–80 nM) with progressive regularization of VF to VT and (B) CBX (0–50 µM) with progressive VF disorganization on ECG. (C) Representative phase maps with tracked RAs in VF in response to RTG 80 nM showing existence of spatially stable RAs. (D) Representative phase maps in VF in response to CBX 50 µM showing disorganized myocardial activation only.
