Evaluation of Microvolt T-Wave Alternans(MTWA) Testing for the Detection of Active Ischemia (MTWA-CAD)

May 23, 2013 updated by: Cambridge Heart Inc.

Evaluation of Microvolt T-Wave Alternans Testing for the Detection of Active Ischemia in Patients With Known or Suspected Coronary Artery Disease: A Feasibility Study

MTWA-CAD is a feasibility study designed to evaluate Microvolt T-Wave Alternans (MTWA) testing for the purpose of detecting active ischemia in patients with known or suspected coronary artery disease (CAD). MTWA is a subtle, alternating pattern in the T wave portion of the surface electrocardiogram (ECG) that is associated with increased risk of ventricular tachyarrhythmias and sudden cardiac arrest (SCA).

Study Overview

Status

Completed

Conditions

Detailed Description

Ischemia, a common trigger for arrhythmias, is a well-documented cause of repolarization alternans. Human studies have shown that active ischemia can be associated with visible as well as microvolt-level T-wave alternans. While MTWA testing is traditionally used to evaluate arrhythmic risk, this known association with ischemia may allow MTWA testing to be used as a diagnostic tool to detect underlying CAD. The MTWA-CAD study will assess the feasibility of this concept by measuring MTWA during routine nuclear stress testing or stress echocardiography with treadmill exercise. This is a feasibility study designed to verify preliminary observations under controlled environments and to generate hypotheses, endpoints, and sample sizes for future investigations.

Study Type

Observational

Enrollment (Actual)

186

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

  • United States
    • Connecticut
      • Bridgeport, Connecticut, United States, 06606
        • Connecticut Clinical Research, Llc
    • Texas
      • Tomball, Texas, United States, 77375
        • Northwest Houston Heart Center

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

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Subjects with known or suspected CAD who are scheduled to undergo routine exercise MPI or stress echocardiography testing for the detection of active ischemia in a cardiology practice or hospital setting.

Description

Inclusion Criteria:

  • Age 18 or above, or of legal age to give informed consent specific to state and national law
  • Willing and capable of providing informed consent
  • Willing and capable of undergoing a SPECT MPI exercise test (or stress echo) at an approved clinical investigational center
  • In normal sinus rhythm at the time of the exercise test
  • A life expectancy of more than 6 months

Exclusion Criteria:

  • In atrial fibrillation at the time of the exercise test
  • Left bundle branch block (precludes ST segment measurement)
  • Pacemaker-dependent
  • Life expectancy of less than 6 months
  • Pregnancy

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

Cohorts and Interventions

Group / Cohort
Patients being evaluated for active ischemia
Subjects with known or suspected CAD who are scheduled to undergo routine exercise MPI or stress echocardiography for the detection of active ischemia are eligible for enrollment.

Collaborators and Investigators

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

Sponsor

Cambridge Heart Inc.

Investigators

  • Principal Investigator: Edward J Kosinski, MD, Connecticut Clinical Research, Llc

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

June 1, 2010

Primary Completion (Actual)

May 1, 2013

Study Completion (Actual)

May 1, 2013

Study Registration Dates

First Submitted

August 2, 2010

First Submitted That Met QC Criteria

August 3, 2010

First Posted (Estimate)

August 4, 2010

Study Record Updates

Last Update Posted (Estimate)

May 27, 2013

Last Update Submitted That Met QC Criteria

May 23, 2013

Last Verified

May 1, 2013

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 60-0001-001

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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