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. 2025 Aug 12;12:1628940. doi: 10.3389/fcvm.2025.1628940

Figure 4.

Multiple heat maps and bar graphs illustrate the effect of different potassium concentrations on sinus left ventricle conduction time (LVCT) and dispersion. The heat maps (A) vary in color intensity, indicating changes across conditions: control, blank variations, and potassium concentrations from 3.5 to 2.0 mmol/L, followed by a wash. Bar graphs (B-I) quantify sinus LVCT, LVCT median, LV dispersion absolute, and LV dispersion time under these conditions. Statistical significance is noted with asterisks, particularly in graphs F, G, and H, relating to LVCT and LV dispersion measures at specified potassium levels.

Effect of low potassium perfusion on ventricular conduction in isolated rats in sinus rhythm. Sinus-LVCT is the left ventricular conduction time in sinus rhythm; Sinus-LVCV median is the left ventricular conduction velocity in sinus rhythm; Sinus-LV-dispersion absolute is the left ventricular conduction dispersion in sinus; Sinus-LV-Dispersion Time is the left ventricular conduction dispersion time in sinus rhythm. (A) Representative graphs of the left ventricular conduction thermogram changes in the control group and low-potassium-treated groups during the experiment in sinus rhythm; (B–E) Statistical graphs of LV conduction time, conduction velocity, conduction dispersion, conduction dispersion time in rats treated with K-H solution in sinus rhythm (n = 4); (F–I) Statistical graphs of LV conduction time, conduction velocity, conduction dispersion, and conduction dispersion time in rats treated with graded low-potassium solution in sinus rhythm (n = 8). *p < 0.05, **p < 0.01, ***p < 0.001.