Heart FailureNCT00580255
Comparison Study of BNP and Thoracic Impedance Measurements on Arrhythmias
An observational study of Heart Failure and Arrhythmias, run by University of California, Davis at 1 site in United States.
Trial summary
It is hypothesized that elevated BNP level correlate with an elevated thoracic impedance/fluid index as measured separately by CRT-D devices and external impedance cardiography. Ultimately, it is also hypothesized that both BNP and thoracic impedance/fluid index measurements are predictive of atrial and ventricular… Read more about this study
- Who is it for?
- Ages 18 to 85 years
- Conditions the study is for
- Heart Failure, Arrhythmias
- How many people
- 0 participants
- Where
- 1 siteUnited States
- Study dates
- Oct 2006to Nov 2006
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 85 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Potential candidates with criteria for implantable cardiac resynchronization therapy who have or will undergo implantation of a Medtronic CRT-D device with thoracic impedance measurement capabilities, will be eligible to enter the study if they meet all of the inclusion criteria and none of the exclusion criteria. Patients will be enrolled in the study either at the time of device implantation or if they have already undergone device implantation will be enrolled at next routine outpatient clinic visit.
Who may be able to join
- Male or female between 18 to 85 years of age.
- All patients with biventricular implantable cardio-defibrillators(manufacturer: Medtronic/ model: InSync 7299/7297 or newer).
- LVEF <35%
- NYHA III/IV
- QRS >120 msec
- Pt willing and able to sign informed consent.
- Conventional heart failure therapy
- Clinically stable for six months.
Who cannot join
- age less than 18 years of age
- age greater than 85 years of age
- Creatinine > 2.5 mg/dl.
- End stage liver disease complicated by ascites as determined by electronic medical record review.
- women who are pregnant, lactating, or plan to become pregnant during the course of the study.
- Patients who are heart transplant candidates with expected transplantation within the next six months.
Show all 12Show fewer
- Life expectancy due to non-cardiac cause less than one year.
- Anticipated problem with compliance.
- Critical valvular stenoses/insufficiencies.
- Morbidly obese patients(>300 lbs.)
- In patients whom impedance cardiography was not able to be performed because of inability to place sensors.
- Planned or known need for revascularization procedures within three months.
Trial locations and contacts
1 site in 1 country.
United States1 site
U C Davis Medical Center
Sacramento, California, 95817
About this study
Official title: Does Elevated Brain Natriuretic Peptide (BNP) Reflect Changes in Thoracic Impedance Levels and Affect Occurrence of Atrial and Ventricular Arrhythmias?
It is hypothesized that elevated BNP level correlate with an elevated thoracic impedance/fluid index as measured separately by CRT-D devices and external impedance cardiography. Ultimately, it is also hypothesized that both BNP and thoracic impedance/fluid index measurements are predictive of atrial and ventricular arrhythmias.
Read the detailed description
The primary aim of this study:
- To assess the correlation between elevated brain natriuretic peptide levels and elevated thoracic impedance/body fluid index as measured by selective biventricular resynchronization devices and an external impedance cardiography device.
- Correlate impedance measurements and brain natriuretic levels with occurrence of atrial and ventricular arrhythmias as assessed by interrogation of biventricular devices.
- Conditions
- Heart Failure, Arrhythmias
- Keywords
- CHF, CRT, Atrial Arrhythmias, Ventricular Arrhythmias, BioZ, Optivol
- Medical subject headings
- Heart Failure, Arrhythmias, Cardiac
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Dec 2007 (estimated)
- Study startOct 2006
- Primary completionNov 2006
- Study completionNov 2006
Why it stopped: resources not available
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Heart FailureStudies of the same condition, open and under way.
- More trials run by University of California, DavisThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 0 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of California, Davis
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Uma Srivatsa, MD, Principal investigator, U C Davis Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00580255
- Sponsor's protocol ID
- 200614766
- Status last verified
- Jan 2013
- First submitted
- 20 Dec 2007
- Last updated
- 21 Jun 2017
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 21 Jun 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Does Elevated Brain Natriuretic Peptide (BNP) Reflect Changes in Thoracic Impedance Levels and Affect Occurrence of Atrial and Ventricular Arrhythmias?
- ClinicalTrials.gov ID
- NCT00580255
- Acronym / sponsor ID
- 200614766
- Conditions
- Heart Failure, Arrhythmias
- Keywords
- CHF, CRT, Atrial Arrhythmias, Ventricular Arrhythmias, BioZ, Optivol
- Study type
- Observational
- Recruitment status
- WithdrawnReason stopped: resources not available
- Enrolment
- 0 participants (actual)
- Lead sponsor
- University of California, DavisUniversity, hospital or other
- Study start
- Oct 2006
- Primary completion
- Nov 2006 (actual)
- Study completion
- Nov 2006 (actual)
- First posted
- 24 Dec 2007 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
It is hypothesized that elevated BNP level correlate with an elevated thoracic impedance/fluid index as measured separately by CRT-D devices and external impedance cardiography. Ultimately, it is also hypothesized that both BNP and thoracic impedance/fluid index measurements are predictive of atrial and ventricular arrhythmias.
Detailed description
The primary aim of this study:
- To assess the correlation between elevated brain natriuretic peptide levels and elevated thoracic impedance/body fluid index as measured by selective biventricular resynchronization devices and an external impedance cardiography device.
- Correlate impedance measurements and brain natriuretic levels with occurrence of atrial and ventricular arrhythmias as assessed by interrogation of biventricular devices.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Ages
- 18 to 85 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Potential candidates with criteria for implantable cardiac resynchronization therapy who have or will undergo implantation of a Medtronic CRT-D device with thoracic impedance measurement capabilities, will be eligible to enter the study if they meet all of the inclusion criteria and none of the exclusion criteria. Patients will be enrolled in the study either at the time of device implantation or if they have already undergone device implantation will be enrolled at next routine outpatient clinic visit.
Key inclusion criteria (8 listed)
- Male or female between 18 to 85 years of age.
- All patients with biventricular implantable cardio-defibrillators(manufacturer: Medtronic/ model: InSync 7299/7297 or newer).
- LVEF <35%
- NYHA III/IV
- QRS >120 msec
Key exclusion criteria (12 listed)
- age less than 18 years of age
- age greater than 85 years of age
- Creatinine > 2.5 mg/dl.
- End stage liver disease complicated by ascites as determined by electronic medical record review.
- women who are pregnant, lactating, or plan to become pregnant during the course of the study.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study was withdrawn before enrolling participants, so there are no results.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 21 Jun 2017.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Uma Srivatsa, MD principal investigator
U C Davis Medical Center
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Heart Failure and Arrhythmias, run by University of California, Davis at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 8 inclusion and 12 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: withdrawn, as of the sponsor's last update on 21 Jun 2017. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study was withdrawn before enrolling participants, so there are no results.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 21 Jun 2017.