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Only one subject was enrolled and that subject was Lost to Follow Up. Decision was made to terminate the study.
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IMPROVE RESPONSE is a physician initiated research study. It is a prospective, non-randomized, multi-center, post-market, U.S. Cardiac Resynchronization Therapy (CRT) in heart failure (HF) observational study. The purpose of this clinical study is to test the hypothesis that market-released CRT devices, which contain the AdaptivCRT (aCRT) algorithm have an incremental benefit in improving CRT response in a chronic CRT non responder population with left bundle branch block (LBBB) and normal atrio-ventricular (AV) condition compared to CRT devices with traditional biventricular pacing delivery methods at generator replacement.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Adaptiv CRT | Other | Adaptiv CRT algorithm in Medtronic FDA approved CRT devices to be programmed as ON at 6 month follow-up visit |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Adaptiv CRT | Device | Adaptiv CRT algorithm to be programmed to ON in CRT devices of study patients at 6 month follow-up visit |
|
| Measure | Description | Time Frame |
|---|---|---|
| Ejection fraction | Change in ejection fraction as determined by echocardiography 6 months following the addition of adaptive CRT as compared to the same end points following patient management optimization | 12 Months |
| NYHA functional class | Change in NYHA functional class 6 months following the addition of adaptive CRT as compared to the same end points following patient management optimization | 12 months |
| Measure | Description | Time Frame |
|---|---|---|
| Atrial fibrillation burden | Atrial fibrillation burden and/or progression to permanent atrial fibrillation as determined by device interrogation and review | 12 Months |
| Heart failure hospitalizations |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Stern Cardiovascular Foundation | Germantown | Tennessee | 38138 | United States |
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| ID | Term |
|---|---|
| D006333 | Heart Failure |
| D002037 | Bundle-Branch Block |
| ID | Term |
|---|---|
| D006331 | Heart Diseases |
| D002318 | Cardiovascular Diseases |
| D006327 | Heart Block |
| D001145 | Arrhythmias, Cardiac |
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Amount and severity of heart failure hospitalizations and health care utilization as reported by subjects
| 12 months |
| Left ventricular end systolic volume | As determined by echocardiographic evidence | 12 months |
| Time to first appropriate therapy for VT and/or VF | Time determined by device interrogation from sensing to response | 12 months |
| Percentage of RV synchronized LV pacing | Percentage determined by device interrogation and compared to clinical outcomes | 12 months |
| D000075224 |
| Cardiac Conduction System Disease |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |