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. 2021 Jun 10;12:667065. doi: 10.3389/fphys.2021.667065

FIGURE 3.

FIGURE 3

Representative electrograms recorded in the stained rabbit isolated heart (left) at the end of stabilization (top), loading with di-4-ANEPPS (middle) and washout (bottom) and in the non-stained rabbit isolated heart (right) in corresponding minutes of the experiment. Prolongation of RR, QT, and QRS appears during the loading procedure and remains obvious till the end of washout in the stained heart.