Extended Data Fig. 7: Boxplots for different groups of sex, BMI and age in a clinical cohort of patients with ischemic heart diseases.

(a) shows QRS duration and conduction velocity; (b) shows QTc interval and delayed rectifier potassium conductance \({G}_{{KrKs}}\) with myocardial mass. The centerline within each box represents the median (50th percentile), while the box bounds correspond to the interquartile range (IQR), with the lower and upper edges indicating the 25th and 75th percentiles, respectively. The whiskers extend to the minimum and maximum values within 1.5 times the IQR from the quartiles. The green dots indicate their means. The corresponding P values are from the two-sided Mannwhitney U-test. *P < 0.05; **P < 0.01; ***P < 0.001; ****P < 0.0001.