Pre-excitation syndrome may be associated with ST-T segment abnormalities on the electrocardiogram, causing prolongation of the QT interval, but such manifestations are not characteristic of pre-excitation syndrome.
Pre-excitation syndrome is a disease syndrome that occurs after an abnormality in cardiac conduction, and some cases of pre-excitation syndrome may present with a regular convergence and divergence of QRS wave group widths, like an accordion, known as the accordion phenomenon. Such pathologic changes may lead to ST-T segment abnormalities on the electrocardiogram, causing prolongation of the QT interval. However, such changes are not diagnostically specific.
The main diagnostic criteria for preexcitation syndrome ECG are abnormal shortening of the P-R interval, abnormal increase in the QRS time limit, abnormally thick and blunt QRS wave onset, and the appearance of delta waves.
If you suffer from pre-excitation syndrome or have the above ECG changes, it is recommended that you go to the hospital in time.