This is true. COPD doesn't cause PVC's. But, coughing and difficulty breathing sure can bring them on.
Has a doctor diagnosed you (someone) to suffer from Chronic Obstructive Pulmonary Disease (COPD)? For those who would have to look it up, COPD is a disease of the lungs usually (always?) accompanied with difficult breathing, I believe.
My guess, is no, it can not "cause" PVCs, but it may aggrivate PVC if one has that problem.
That's all I have to offer.