Furthermore, there was evidence for significant additional genetic factors specific to RTU and ND.

Results: The results suggested that the liabilities to TI, RTU and ND were correlated.

The variance specific to liability to RTU was entirely accounted for by additive genetic factors.

QTu and RTu dispersion determined from the 12-lead ECG did not consistently reflect the myocardial changes.

Conclusions: This study showed significant overlap in the contribution of genetic factors to individual differences in TI, RTU and ND.