Embodiments of device for monitoring pressure in the left atrium are provided. The device is delivered to the left atrium via the coronary sinus. A first portion of the device is deployed in the left atrium, the first portion of the device comprising a pressure sensor. A second portion of the device is deployed in the coronary sinus. Monitoring left atrial pressure via coronary sinus access can provide a safer, less invasive way to monitor a patient for heart failure.
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