What could be the cause of an ekg with short pr, wide qrs, and no delta waves?

Delta waves are not present either in minimal preexcitation in WPW or in non-WPW forms of preexcitation.

I assume you're not taking any meds that can cause these conduction abnormalities. Short PR interval can be a normal variant but can predispose one to supraventricular arrhythmias. An abnormally wide QRS indicates a problem with conduction of electrical impulses through the ventricles. Can be caused from damage of tissues from old viral infections or infarctions&can cause ventricular arrhythmias