Beating Versus Arrested Heart for Mitral Valve Replacement (BAHMVR)

July 17, 2012 updated by: Clotario Neptali Carrasco Cueva, Federal University of Bahia

Clinical and Ultramicroscopic Myocardial Randomized Study of On-Pump Beating Heart Mitral Valve Replacement

The purpose of this study is to evaluate the immediately clinic and ultramicroscopic myocardial cellular ischemia and reperfusion to replace of the mitral valve using arrested heart versus on-pump empty beating heart surgical techniques.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

During open-heart surgery prevention of ischemia and reperfusion following cardioplegic arrest are essential for myocardial protection. Beating heart surgery on normothermic bypass simulates physiologic cardiac status and is good method for myocardial protection. A comparison of both available techniques for valve replacement arrested heart versus on-pump empty beating heart of the clinical and ultramicroscopic myocardial alterations will allowed to better understand myocardial protection because eliminated the use of cardioplegia and the corollary risk of ischemic reperfusion injury.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
34

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Brazil
    • Bahia
      • Salvador, Bahia, Brazil, 40.000
        • Hospital Ana Neri

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

14 years to 56 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • all patient included into the study were adults 18-60 years old,
  • with an echocardiography diagnosis of mitral and/or tricuspid valve disease due to inflammatory acquired diseases,
  • no previous history of cardiac surgery and d) elective indication for valve replacement.

Exclusion Criteria:

  • with metabolic diseases such as diabetes mellitus and uremia,
  • with coronary artery diseases,
  • dilated myocardiopathy,
  • with severe chronic pulmonary obstructive diseases,
  • with present or past history of malignant diseases,
  • acute endocarditis
  • with severe pre-operatory laboratory parameters such as creatinine levels > 3mg/dL, Hemoglobin ≤ 7.0 g/dL, Prothrombin time/activity ≤ 70% and clotting time ≥ 10 minutes.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Beating heart surgery
Group A (Beating heart) surgery was performed under normal temperature (36⁰ C) ,once CPB was established, the patient was placed in Trendelenburg position and a retrograde perfusion catheter was inserted into the coronary sinus and ligated by a simple suture line. Aorta cross clamping was immediately established and blood was oxygenated and delivered continuously through a catheter Mitral valve was exposed using the left atrial retractor. Mitral valve replacement (MVR) was performed using a metallic or bioprostheses substitution by interrupted suture De Vegas' technique.
Procedure: Mitral valve replacement
Mitral valve replacement (MVR) was performed using a metallic or bioprostheses substitution by interrupted suture. For the beating heart the prostheses was functionally tested before removal of the retrograde perfusion catheter and for the arrested heart the prosthesis was artificially tested by pumping saline into the left ventricle. The tricuspid valve repair was done following De Vegas' technique in both groups
Active Comparator: heart surgery Group B
Group B (arrested heart) surgery was performed under moderate hypothermia (32⁰C) as technique requirement (3). After cardiac arrest, during the period of cross clamping, the aortic root was perfused through the cardioplegias's cannula with oxygenated blood at a rate between 200 mL/min to 300 mL/min for 2 minutes with 15 minutes intervals.Mitral valve replacement (MVR) was performed using a metallic or bioprostheses substitution by interrupted suture De Vegas' technique.
Procedure: mitral valve replacement
Mitral valve replacement (MVR) was performed using a metallic or bioprostheses substitution by interrupted suture. For the beating heart the prostheses was functionally tested before removal of the retrograde perfusion catheter and for the arrested heart the prosthesis was artificially tested by pumping saline into the left ventricle. The tricuspid valve repair was done following De Vegas' technique in both groups

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
mitral valve replacement
Time Frame: 1hour , 3 hours and 1 hour after surgery procedure
Mitral valve replacement (MVR) was performed using a metallic or bioprostheses substitution by interrupted suture. For the beating heart the prostheses was functionally tested before removal of the retrograde perfusion catheter and for the arrested heart the prosthesis was artificially tested by pumping saline into the left ventricle. The tricuspid valve repair was done following De Vegas' technique in both groups with the beating heart also in the group B.
1hour , 3 hours and 1 hour after surgery procedure

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Ultramicroscopic evidences of ischemia
Time Frame: 1hour, 3 hours and 1 hour after aortic clamping
During the surgery myocardial biopsies were performed as full thickness transmural specimen of three small fragments for electromicrospic analysis
1hour, 3 hours and 1 hour after aortic clamping

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Federal University of Bahia

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
April 1, 2010

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
March 1, 2011

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 1, 2012

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 10, 2012

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 16, 2012

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 17, 2012

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 18, 2012

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 17, 2012

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2012

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • REQ:690

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