Fig. 2.

Electrocardiographic waveform and interval durations. Basic electrophysiological parameters evaluated in CTRL (triangles) and TiO₂-NPs treated (square) animals. a P wave duration (ms). b PQ segment duration (ms). c QRS complex duration (ms). d RR interval duration (ms). e QTc duration (ms). Kruskal-Wallis (post hoc analyses: Dunn’s multiple comparison) was performed and statistical significance was set at p < 0.05. * vs corresponding 1° week; # vs corresponding 3° week. Data are represented as median and interquartile range (IQR)