T-wave Alternans and Intrathoracic Impedance Measurements
Public ClinicalTrials.gov record NCT00669682. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
T-wave alternans is a test that is currently being used to risk stratify patients with structural heart disease for sudden cardiac death. The mechanism of T-wave alternans is unclear, but may share a common abnormality with conditions of cardiac fluid overload such as heart failure, which is altered intracellular calcium handling. Current Medtronic implantable defibrillators have the capability of monitoring cardiac fluid status via transthoracic impedance measurements. The purpose of this study is to determine if a correlation exists between T-wave alternans status and cardiac volume status, as determined by transthoracic impedance measurements. Secondarily, the study seeks to examine the relationship between arrhythmia frequency and T-wave alternans or cardiac volume status.
Study identification
- NCT ID
- NCT00669682
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 9 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jul 31, 2008
- Primary completion
- Mar 31, 2012
- Completion
- Mar 31, 2012
- Last update posted
- Apr 18, 2013
2008 – 2012
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Columbia University Medical Center | New York | New York | 10032 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Recently updated Congestive Heart Failure trials
Other public records listing Congestive Heart Failure. Sorted by last update posted; newest first. Not a recommendation.
- NCT05507879: TRPC6 Characterization to Predict and Prevent Chemotherapy Related Cardiomyopathy and Heart Failure With Breast Cancer Recruiting
- NCT07730827: Community-Informed Interventions for Equitable Congestive Heart Failure Management in Primary Care Recruiting
- NCT02632656: Plasma ExtrAcellular RNAs and Biomarkers of Heart FaiLure During Decongestion: PEARL-HF Study Active, not recruiting
- NCT07096726: Boston Medical Center Ultrasound Decongestion Study in Heart Failure Not yet recruiting
- NCT07400042: Peripheral Venous Pressure (PVP) Trial Not yet recruiting
- NCT07356843: Palliative Care for People With HF Recruiting
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00669682, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Apr 18, 2013 · Synced Sep 12, 2026
Related: full search, browse by condition, browse by drug or therapy, browse by sponsor, browse by U.S. city.
Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00669682 live on ClinicalTrials.gov.