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. 2013 Jan 20;18(4):336–343. doi: 10.1111/anec.12038

Figure 5.

Figure 5

The relationship of the change in P‐P interval shortening surrounding QRS complexes during heart block to the change in the sinus rate variability. The change in the P‐P interval shortening from baseline state to deep breathing was positively correlated with the change in sinus rate (r = 0.36, P = 0.03).