CRM and Fusion Beats: Effects of Progressive Fusion on Intra-left Ventricular Mechanical Function

ClinicalTrials.gov ID: NCT00610896

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Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

This study is looking at cardiac rhythm management (CRM) and fusion beats in patients who have a pacemaker or implantable cardioverter-defibrillator (ICD), to determine if there is a correlation between the time between the contraction of the upper chambers of the heart (atrium) and the lower chambers of the heart, (ventricle) and heart function. Some studies of people with pacemakers have been done to determine if shortening the time of contraction between the atrium and ventricle could benefit the function of the left ventricle. These studies have shown that there is no benefit in heart function.There have been other studies which have shown that chronic pacing of the right ventricle, especially with the lead placed at the tip of the right ventricle, can lead to a decrease in the function of the left ventricle and congestive heart failure. In some patients long term pacing of the right ventricle has also been associated with a reduction in the ability of the left ventricle to pump blood. This is know as a reduced left ventricular ejection fraction, which can be documented by an echocardiogram. This study proposes to evaluate the acute effects of progressive paced fusion beats on the left ventricle to answer the question whether there is an delay between the atrium and ventricle that is "too long" or "too short".

Study identification

NCT ID: NCT00610896
Recruitment status: Completed
Study type: Observational
Phase: Not listed
Lead sponsor: Essentia Health; Other
Enrollment: 25 participants

Conditions and interventions

Conditions

Cardiomyopathy

Interventions

Not listed

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: Jan 2008 (Type not available)
Primary completion: May 2010 (Actual)
Completion: Sep 2010 (Actual)
Last update posted: Sep 2, 2011

2008 – 2010

United States locations

U.S. sites: 1
U.S. states: 1
U.S. cities: 1

Facility	City	State	ZIP	Site status
Essentia Health	Duluth	Minnesota	55805	—

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

About this trial record page

What this page shows: Public field values for ClinicalTrials.gov record NCT00610896, 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 Sep 2, 2011 · Synced Nov 15, 2026