Patent ID: 7250041

Claim:
A method comprising: accessing a vein selected from the group consisting of external femoral, interior femoral, carotid, jugular, brachial, subclavian, and cephalic with a guide catheter; accessing a coronary sinus with the guide catheter; feeding a guidewire and a retroinfusion balloon catheter to the coronary sinus through the guide catheter; performing a venogram; deploying the guidewire and the balloon catheter to a targeted vein; measuring a baseline parameter in the vein adjacent to a distal end of the balloon catheter; inflating a balloon at the distal end of the balloon catheter to a pressure sufficient to make a pressure waveform in the vein become ventricularized; after inflating the balloon, delivering a liquid comprising at least one of a drug and a treatment agent through the balloon catheter to an outlet port on the balloon catheter distal to the balloon; stopping the delivering of the liquid; deflating the balloon; and removing the catheter from the vessel.