hi i have a dual chamber lead pacemaker and my pacemaker clinic believes my pacemaker lead had either dropped or dislodged and is pacing me where i don't need pacing it's my question is can the leads cause pvcs how can a venogram check the position my leads. i had a pacemaker lead dislodgement once before a few years ago, they did notice the pvcs on an echo and stress test along with me being hooked up to the machine that checks your pacemaker i'm having a upper venogram in the morning