2.7 Statistical analysis
IBM SPSS Statistics software (version 20) was utilized to analyze the
data. For checking the normality test of the data, the F-test or the
t-test was used for the data in accordance with normal distribution;
otherwise, the Kruskal-Wallis test was used. Two tailed P< 0.05 was set as statistical significance. The distance from
the pacing electrode to the coronary artery was calculated as the mean ±
standard deviation.