Patent ID: 8287458

Claim:
A method of measuring pressures in a coronary sinus, the method comprising: introducing a distal portion of a lead or tool into the coronary sinus, wherein the distal portion comprises a pressure sensor, and a first occlusion device, and a second occlusion device; positioning the pressure sensor near a first junction of the coronary sinus with a first vein intersecting the coronary sinus; and expanding the first occlusion device and the second occlusion device so the sensor capability primarily reads the pressure of the first vein intersecting the coronary sinus; wherein the pressure sensor is disposed between the first occlusion device and the second occlusion device; wherein the first occlusion device is expanded proximal of the first junction and the second occlusion device is expanded distal of the first junction; and wherein the expansion of the first and second occlusion devices isolates the sensor from all veins intersecting the coronary sinus, except the first vein; and wherein the first vein is any one of a great cardiac vein, a middle cardiac vein, lateral cardiac vein, or a small cardiac vein.