Figure 6

Correlations between ECG indices and fractional shortening at the age of 24 months. Some of the most significant correlations found between ECG indices at any age and the LVFS at 24 months of age in GRMD dogs (black dots) are represented on these graphs; healthy dogs’values are represented by empty dots but were not included in the correlation analysis. (A) Significant negative correlation between the heart rate at 4 months of age and LVFS at 24 months of age (R = − 0.786) (B) Significant positive correlation between the VLF power at 4 months and LVFS at 24 months of age (R = − 0.929) (C) Significant positive correlation between the PR interval and LVFS at 24 months of age (R = 0.738).