While I agree with you, here in Arizona our patients are routinely informed (recommended) that their DNR status is suspended for a specific procedure, eg Cardiac Catheterization/Stent/Balloon Angioplasty. The suspension is noted on the consent. When a guidewire wiggles into the LV and the patient goes into Vtac/fib due to our intervention we will defibrilate them. There are rare cases of chest compressions. We just know we are working with a sick heart at the beginning and try to prep for the worst.