Device and method for perfusing a subject's heart via the coronary sinus

A device for perfusing a coronary sinus of a subject's heart, the device comprising:

• a double-lumen catheter comprising:
• a first lumen having:
• a proximal opening, and
• a distal opening configured to be positioned in a coronary sinus of a subject's heart;
• a second lumen parallel to the first lumen, the second lumen having:
• a proximal opening, and
• a distal opening being offset from the distal opening of the first lumen towards the proximal opening of the second lumen in a longitudinal direction, the distal opening of the second lumen being configured to be positioned in a right atrium of the subject's heart;
• and
• an inflatable member positioned on an outer portion of the catheter in a region between the distal opening of the first lumen and the distal opening of the second lumen;
• wherein the inflatable member has a shape configured to occlude a portion less than an entire transverse cross-section of the coronary sinus to ensure a flow of blood between the coronary sinus and the right atrium when the inflatable member is completely inflated in the coronary sinus, the shape of the inflatable member being also configured to fixate the catheter in the coronary sinus when the inflatable member is completely inflated in the coronary sinus;
• and
• an oxygenator connected to the proximal openings of the first lumen and the second lumen, the oxygenator is configured to oxygenate deoxygenated blood.