Akin to Cx40−/− mice, Cx40−/−Panx1−/− mice exhibited cardiac hypertrophy and elevated systolic, diastolic, and mean arterial blood pressure compared with WT and Panx1−/− mice; however assessment of left ventricular ejection fraction and fractional shortening revealed no evidence of cardiac dysfunction between groups. This evidence concerns the gene PANX1 and cardiac hypertrophy.