PVCs are the result of premature electrical stimulation orginating in the ventrical (instead of the atrium, where the signal is supposed to originate). ECG (or EKGs) detect electrical activity of the heart. If your only symptom is occasional PVCs, this problem would have been picked up.
did you have palpitations when the ECGs were being recorded? if not then they wouldn't show the cause. the test you need depends on how often you get the palpitations. if you get them everyday you need a 24hr ambulatory ECG. if less often a Cardiomemo which is activated when you get the symptoms is more appropriate
I have really bad palps and 4 ECG'S were done in the doctors surgery which took maybe around 5 mins and ive also had a 24 hour monitor but typically i didnt have a single palp while i was wearing them. Thats why i wanted to know if they could still pick up something even though i didnt have a palp.