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. 2017 Aug 9;10(8):e004777. doi: 10.1161/CIRCEP.116.004777

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© 2017 The Authors.

Circulation: Arrhythmia and Electrophysiology is published on behalf of the American Heart Association, Inc., by Wolters Kluwer Health, Inc. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial-NoDerivs License, which permits use, distribution, and reproduction in any medium, provided that the original work is properly cited, the use is noncommercial, and no modifications or adaptations are made.

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Figure 4. — Mechanically induced premature ventricular excitation (PVE_M) thresholds. Box-and-whisker plots of mechanical stimulation characteristics (precontact kinetic energy, mean deformation rate, peak force, mean stress, intraventricular pressure surge amplitude, and local tissue deformation) at PVE_M threshold with varying combinations of freewall contact location (midleft ventricular [mid-LV; blues boxes] and midright ventricular freewall [mid-RV; red boxes]) and contact area (3.1 mm² [lighter boxes] and 28.3 mm² [darker boxes]). Only local tissue indentation (far right) forms a uniform predictor of PVE_M threshold across the various stimulation protocols. Measurements from 7 hearts. P values are for comparison of contact location and area by 2-way ANOVA with Tukey–Kramer post hoc tests.