Fig. 6
From: Computational simulations of the effects of the G229D KCNQ1 mutation on human atrial fibrillation
Vulnerability to spiral waves constructed by summarizing the outcomes at various S1–S2 intervals. F indicates “failure to propagate.” This means that the S2 failed to generate the wave. R indicates “reentry generation.” Therefore, S2 triggered the occurrence of a spiral wave. P indicates “normal propagation” which means S2 generates wave that propagates normally along the tissue and disappear