Data Collection Study of Wedge Pressure Data in Patients With CRT-D Devices

Inclusion Criteria:

Have a SJM PROMOTE CRT-D (Model 3207 or other model with similar functioning) system that was implanted at least 4 months prior to enrollment for an approved indication per ACC/AHA/HRS guidelines.
Have the ability to provide written informed consent for study participation and be willing and able to comply with the prescribed follow-up tests and schedule of evaluation.
Have legally marketed bipolar right atrial and true bipolar right ventricular pacing defibrillation leads, and a legally marketed endocardial bipolar LV lead.

Exclusion Criteria:

Be less than 18 years of age.
Have any medical condition that would interfere with intra-thoracic measurements such as end-stage pulmonary disease, advanced interstitial pulmonary disease, or frequent episodes of pneumonia.
Have a contraindication for right heart catheterization.
Have a contraindication for the delivery of IV Nitroglycerin.
Be pregnant or planning a pregnancy for the duration of their study participation.
Be currently participating in a clinical investigation that includes an active treatment arm.
Have a life expectancy of less than 12 months due to any condition.
Be unable to perform the Valsalva maneuver with airway pressure > 40 mm Hg for ≥10 seconds.
Are pacemaker dependent, where cessation of pacemaker function consistently results in syncope or ventricular asystole.