The invention is generally directed to an accessing system for a patient's coronary sinus which includes a tubular support member with a distal extremity extending into the right atrium of the patient's heart. A guide member is disposed within a first lumen of the tubular support member and advanced...http://www.google.de/patents/US7041097?utm_source=gb-gplus-sharePatent US7041097 - System and method for accessing the coronary sinus
