---
title: Ensure Cardiac Resynchronization Therapy Study
nct_id: NCT00291564
overall_status: COMPLETED
sponsor: Medtronic Cardiac Rhythm and Heart Failure
study_type: OBSERVATIONAL
primary_condition: Heart Failure
countries: United States
canonical_url: "https://parkinsonspathways.com/agent/trials/NCT00291564.md"
clinicaltrials_gov: "https://clinicaltrials.gov/study/NCT00291564"
ct_last_update_post_date: 2007-12-21
last_seen_at: "2026-05-12T07:23:17.785Z"
source: ClinicalTrials.gov (mirrored, no enrichment)
---
# Ensure Cardiac Resynchronization Therapy Study

**NCT ID:** [NCT00291564](https://clinicaltrials.gov/study/NCT00291564)

## Key Facts

- **Status:** COMPLETED
- **Study Type:** OBSERVATIONAL
- **Target Enrollment:** 430
- **Lead Sponsor:** Medtronic Cardiac Rhythm and Heart Failure
- **Collaborators:** Medtronic
- **Conditions:** Heart Failure
- **Start Date:** 2004-05
- **Completion Date:** 2006-02
- **CT.gov Last Update:** 2007-12-21

## Brief Summary

The purpose of this study is to gather information on how doctors program particular settings on cardiac resynchronization therapy implantable cardiac defibrillators (CRT-Ds), to analyze how these settings affect the amount of cardiac resynchronization therapy (CRT) patients receive and to evaluate the therapy approach for converting abnormally fast heartbeats into normal heartbeats. There are no experimental devices or procedures involved in this study.

## Eligibility

- **Minimum age:** 18 Years
- **Sex:** ALL
- **Healthy Volunteers:** No

```
Inclusion Criteria:

* Patient is indicated for a Medtronic CRT-D system
* Patient is willing to sign Permission for Access to and Use of Health Information form
* Patient is willing and able to comply with follow-up visits through six months

Exclusion Criteria:

* Patient has a life expectancy of less than 6 months
* Patient is participating in any concurrent study that could confound the results for either study
```

## Interventions

- **Cardiac Resynchronization Therapy Device** (DEVICE)

## Locations (32)

- Birmingham, Alabama, United States
- Newport Beach, California, United States
- Trumbull, Connecticut, United States
- Daytona Beach, Florida, United States
- Augusta, Georgia, United States
- Kankakee, Illinois, United States
- Indianapolis, Indiana, United States
- Des Moines, Iowa, United States
- Owensboro, Kentucky, United States
- New Orleans, Louisiana, United States
- Salisbury, Maryland, United States
- Burlington, Massachusetts, United States
- Detroit, Michigan, United States
- Traverse City, Michigan, United States
- Minneapolis, Minnesota, United States
- Mexico, Missouri, United States
- Omaha, Nebraska, United States
- Bridgewater, New Jersey, United States
- Englewood, New Jersey, United States
- Charlotte, North Carolina, United States
- Dayton, Ohio, United States
- Lyndhurst, Ohio, United States
- Oklahoma City, Oklahoma, United States
- Portland, Oregon, United States
- Abington, Pennsylvania, United States
- Doylestown, Pennsylvania, United States
- Columbia, South Carolina, United States
- Nashville, Tennessee, United States
- Houston, Texas, United States
- Fairfax, Virginia, United States
- Richmond, Virginia, United States
- Seattle, Washington, United States

## Recent Field Changes (last 30 days)

- `armsInterventions.interventions` — added _(2026-05-12)_
- `sponsor.lead` — added _(2026-05-12)_
- `eligibility.criteria` — added _(2026-05-12)_
- `status.overallStatus` — added _(2026-05-12)_
- `status.completionDate` — added _(2026-05-12)_
- `status.lastUpdatePostDate` — added _(2026-05-12)_
- `design.enrollmentCount` — added _(2026-05-12)_
- `eligibility.minAge` — added _(2026-05-12)_
- `eligibility.sex` — added _(2026-05-12)_
- `sponsor.collaborators` — added _(2026-05-12)_
- `results.hasResults` — added _(2026-05-12)_
- `locations.|birmingham|alabama|united states` — added _(2026-05-12)_
- `locations.|newport beach|california|united states` — added _(2026-05-12)_
- `locations.|trumbull|connecticut|united states` — added _(2026-05-12)_
- `locations.|daytona beach|florida|united states` — added _(2026-05-12)_
- `locations.|augusta|georgia|united states` — added _(2026-05-12)_
- `locations.|kankakee|illinois|united states` — added _(2026-05-12)_
- `locations.|indianapolis|indiana|united states` — added _(2026-05-12)_
- `locations.|des moines|iowa|united states` — added _(2026-05-12)_
- `locations.|owensboro|kentucky|united states` — added _(2026-05-12)_
- `locations.|new orleans|louisiana|united states` — added _(2026-05-12)_
- `locations.|salisbury|maryland|united states` — added _(2026-05-12)_
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- `locations.|omaha|nebraska|united states` — added _(2026-05-12)_
- `locations.|bridgewater|new jersey|united states` — added _(2026-05-12)_
- `locations.|englewood|new jersey|united states` — added _(2026-05-12)_
- `locations.|charlotte|north carolina|united states` — added _(2026-05-12)_
- `locations.|dayton|ohio|united states` — added _(2026-05-12)_
- `locations.|lyndhurst|ohio|united states` — added _(2026-05-12)_
- `locations.|oklahoma city|oklahoma|united states` — added _(2026-05-12)_
- `locations.|portland|oregon|united states` — added _(2026-05-12)_
- `locations.|abington|pennsylvania|united states` — added _(2026-05-12)_
- `locations.|doylestown|pennsylvania|united states` — added _(2026-05-12)_
- `locations.|columbia|south carolina|united states` — added _(2026-05-12)_
- `locations.|nashville|tennessee|united states` — added _(2026-05-12)_
- `locations.|houston|texas|united states` — added _(2026-05-12)_
- `locations.|fairfax|virginia|united states` — added _(2026-05-12)_
- `locations.|richmond|virginia|united states` — added _(2026-05-12)_
- `locations.|seattle|washington|united states` — added _(2026-05-12)_

---

*Canonical: https://parkinsonspathways.com/agent/trials/NCT00291564.md*  
*Source data (authoritative): https://clinicaltrials.gov/study/NCT00291564*  
*This page is a raw mirror with no AI summary, no editorial enrichment, and no Parkinson's-specific filtering.*