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Calcium handling in murine atria. A, the effects of tetracaine, caffeine, and 2-APB on calcium sparks in single myocytes isolated from murine atria. con, control. B, the spatial location of the sparks from different line scans on a single myocyte. C, the effect of tetracaine, caffeine, and 2-APB on Ca2+ transients in intact atrial tissue.
