Method and apparatus for measuring left ventricular pressure

摘要

A body implantable system employs a lead system having at least one electrode and at least one pressure transducer at a distal end. The lead system is implanted within a patient's heart in a coronary vein of the left ventricle. The lead system includes an occlusion device at a distal end to occlude flow in the coronary vein. The pressure transducer is attached to a catheter that is disposed within an open lumen of the lead system. The pressure transducer senses a coronary vein pressure, the coronary vein pressure being proportional to the left ventricular pressure. The sensed coronary vein pressure gives indications of hemodynamic state of the left ventricle, and measured coronary vein pressure can be used to change a signal sent to the electrode to adaptively pace the patient's heart. The body implantable system can further utilize a right ventricular pressure measurement in concert with the left ventricular pressure measurement to modify pacing therapy parameters.