The Effect of Right Ventricular Pacing on Myocardial Oxid... | NCT00704093

Studies
The Effect of Right Ventricular Pacing on Myocardial Oxidative Metabolism and Efficiency

NCT00704093

Sponsor

University of Turku

Status

Completed

Last Update Posted

Jul 4, 2008Estimated

Enrollment

10Actual

Phase

Not Applicable

Conditions

Bradycardia

Interventions

Right ventricular pacing

Countries

Finland

Protocol Section

Identification Module Status Module Sponsor/Collaborators Module Oversight Module Description Module Conditions Module Design Module Arms/Interventions Module Outcomes Module Eligibility Module Contacts/Locations Module References Module IPD Sharing Statement Module

Results Section

Participant Flow Module Baseline Characteristics Module Outcome Measures Module Adverse Events Module More Info Module

Annotation Section

Annotation Module

Document Section

Large Document Module

Derived Section

Miscellaneous Info Module Condition Browse Module Intervention Browse Module

Protocol Section

Identification Module

NCT ID

Results Section

No data available

No data is available for this block.

Annotation Section

No data available

No data is available for this block.

Document Section

No data available

No data is available for this block.

Derived Section

Miscellaneous Info Module

Version Holder

Status Module

Record Verification Date

Jul 2008

Overall Recruitment Status or Expanded Access Status

Completed

Last Known Status

Not provided

Delayed Posting

Not provided

Why Stopped

Not provided

Expanded Access Info

Start Date

Jan 2008

Primary Completion Date

Jun 2008Actual

Completion Date

Jun 2008Actual

First Submitted Date

Jun 23, 2008

First Submission Date that Met QC Criteria

Jun 23, 2008

First Posted Date

Jun 24, 2008Estimated

Results Waived

Not provided

Results First Submitted Date

Not provided

Results First Submitted that Met QC Criteria

Not provided

Results First Posted Date

Not provided

Certification/Extension (aka Delayed Results) First Submitted Date

Not provided

Certification/Extension First Submitted that Passed QC Review

Not provided

Certification/Extension First Posted Date

Not provided

Last Update Submitted Date

Jul 3, 2008

Last Update Posted Date

Jul 4, 2008Estimated

Name	Class
Leiden University Medical Center	OTHER

Oversight Module

Has Data Monitoring Committee (DMC)

Is FDA Regulated Drug

Not provided

Is FDA Regulated Device

Not provided

Is Unapproved Device

Not provided

Pediatric Postmarket Surveillance of a Device Product

Not provided

Product Exported from US

Not provided

FDAAA801 Violation

Not provided

Description Module

Brief Summary

Right ventricular (RV) apical pacing induces a left bundle branch block (LBBB) type electrical activation sequence in the heart. This abnormal activation pattern of the ventricles may have detrimental effects on cardiac structure and function. RV pacing has been shown to impair left ventricular (LV) function both in normal and failing hearts. Importantly, it has been demonstrated that this deterioration in LV function is related to the presence of LV dyssynchrony during RV pacing.

The exact effects of RV pacing on myocardial perfusion, oxidative metabolism and cardiac efficiency have not been fully elucidated. The objective of the present study is to evaluate the effect of RV pacing on both global and regional oxidative metabolism and perfusion, and myocardial efficiency. In addition, the effect of RV pacing induced LV dyssynchrony on myocardial oxidative metabolism and efficiency will be studied.

Our hypothesis is that LV dyssynchrony during RV pacing results in regional abnormalities in LV perfusion and oxidative metabolism. LV dyssynchrony will also result in altered myocardial efficiency.

Detailed Description

Right ventricular (RV) apical pacing induces a left bundle branch block (LBBB) type electrical activation sequence in the heart. This abnormal activation pattern of the ventricles may have detrimental effects on cardiac structure and function. Several clinical trials have demonstrated an association between RV pacing and an increased risk of heart failure and death. In addition, RV pacing has been shown to impair left ventricular (LV) function both in normal and failing hearts. Importantly, it has been demonstrated that this deterioration in LV function is related to the presence of LV dyssynchrony during RV pacing.

The exact effects of RV pacing on myocardial perfusion, oxidative metabolism and cardiac efficiency have not been fully elucidated. Importantly, the relation between the presence of LV dyssynchrony during RV pacing and changes in myocardial perfusion, oxidative metabolism and cardiac efficiency has not been studied.

Ten patients with normal LV ejection fraction and VVI/DDD pacemaker will be studied during AAI-pacing/sinus rhythm without RV pacing (pacing-OFF) and with RV-pacing (pacing-ON) at the same heart rate. Dynamic [15O]water and [11C]acetate positron emission tomography is used to measure perfusion and oxidative metabolism (kmono) of the LV. An echocardiographic examination is used to assess LV stroke volume (SV) and LV dyssynchrony.

The PET data will be first analyzed based on RV pacing mode only, comparing the two pacing conditions (pacing-ON vs. pacing-OFF). Thereafter, the study population will be divided into two groups, according to the presence of LV dyssynchrony during RV pacing.

Design Module

Study Type

Interventional

Number of References to an Expanded Access Study

Not provided

Expanded Access Types

Not provided

Patient Registry

Not provided

Target Follow-Up Duration

Not provided

Phases

Not Applicable

Interventional Study Design

Allocation

Biospecimen

No data available

No data is available for this block.

Enrollment

10Actual

Arms/Interventions Module

Arm Groups

Not provided

Interventions

Name	Type	Description	Arm Group Labels	Other Names
Right ventricular pacing	Device	Right ventricular pacing vs. sinus rhythm or atrial pacing at the same rate

Outcomes Module

Primary Outcomes

Measure	Description	Time Frame
myocardial perfusion, oxidative metabolism and efficiency		At baseline and at 2 hours

Secondary Outcomes

Not provided

Other Outcomes

Not provided

Eligibility Module

Eligibility Criteria

Inclusion Criteria:

Informed consent
Age over 18 years
Previously implanted permanent pacemaker (DDD or VVI)
Normal left ventricular function

Exclusion Criteria:

Pacemaker dependency
Symptomatic coronary artery disease
Pregnancy

Accepts Healthy Volunteers

Sex

All

Sex/Gender Based

Not provided

Sex/Gender Description

Not provided

Minimum Age

18 Years

Maximum Age

Not provided

Standard Ages

AdultOlder Adult

Study Population

Not provided

Sampling Method

Not provided

Contacts/Locations Module

Central Contacts

Not provided

Overall Officials

Name	Affiliation	Role
Juhani Knuuti, MD, prof	Turku PET Centre	Study Director

Locations

Facility	Status	City	State	ZIP	Country	Contacts
Turku PET Centre		Turku		20520	Finland

Condition Browse Module

MeSH Terms

ID	Term
D001919	Bradycardia

Ancestor Terms

ID	Term
D001145	Arrhythmias, Cardiac
D006331	Heart Diseases
D002318	Cardiovascular Diseases
D010335	Pathologic Processes

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Browse Branches

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