Cardioelectrophysiologic studies of isolated hearts. Upper left histogram shows the percentage of hearts drivenalbe by the pacemaker or manifesting ventricular arrhythmia. The number of animals is indicated at the top of each bar. Upper right histogram shows the values of conduction velocity measured at each time point of both groups. *, p < 0.05 and **, p < 0.01, compared to the control group. Lower panel, examples of activation maps with normal activation sequence from the alcohol (A) and the control group (B), as well as with conduction disturbance (C) from the alcohol group. The black bar means start of the reentry, and the curved arrow indicated the propagation direction Note that the values of conduction velocity in A and B are displayed at the bottom of the maps.