Induced Myocardial Ischemia: a Serial Troponin T and Troponin I Measurements (ICE-land)

February 20, 2018 updated by: Asthildur Arnadottir, Herlev Hospital

Serial Measurements of High-sensitivity Cardiac Troponin T and Troponin I After Short, Controlled Induced Cardiac Ischemia

Background Troponin are proteins found in the cardiomyocyte and are a cornerstone in the diagnoses of acute myocardial infarction. Troponin is released to the bloodstream as a result of an cardiomyocyte injury. Troponin is frequently assessed in hospital care for patients with chest pain and dyspnea.

Guidelines recommend troponin assessment at admission and repeated at 3 to 6 hours, depending on the assay. High-sensitivity assays measure concentrations that are ten-times lower than earlier generations of assays. However, the time from when troponin is elevated in the bloodstream after an ischemic injury, measured with high-sensitivity assays, are not fully known.

During an X-ray imaging of the heart's blood vessels (coronary angiogram) it is possible to do a short, controlled occlusion of coronary artery by inflating a small balloon in one of the coronary arteries. Numerous earlier studies in patients have used this method for induced occlusion of one coronary artery for 1 to 3 minutes. Only one of the studies measured troponin I.

The aim with this study is to quantify and compare the release of troponin T and troponin I in the early hours after a controlled induced ischemia.

Study Design This is a prospective, descriptive and experimental study. There will be included 40 patients, without acute ischemic cardiac disease. They will be randomized in 4 groups.

0: 10 patients - control group, no balloon occlusion

  1. 10 patients - balloon occlusion for 30 seconds
  2. 10 patients - balloon occlusion for 60 seconds
  3. 10 patients - balloon occlusion for 90 seconds

Subsequently there will be assessed serial blood samples 0 - 3 hours: Every 15 minutes 3 - 6 hours: Every 30 minutes

Statistics This is a pilot study and it is estimated that ten patients are sufficient number of patients in each group to assess elevation of troponin after occlusion of coronary artery. The thesis is there is a dosage-response correlation between the length of balloon occlusion and the concentration of troponin in blood stream.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

34

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

  • Denmark
      • Copenhagen, Denmark, 2900
        • Herlev-Gentofte Hospital

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 to 85 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patient referred to coronary angiography due to suspicion of ischemic heart disease.

Description

Inclusion Criteria:

  • > 18 years of age Elective coronary angiogram Informed signed accept

Exclusion Criteria:

  • Stenosis or atherosclerosis of the coronary artery Renal Failure or p-creatinin > 100 µmol/L Heart Failure or LVEF < 50 Severe Heart Valve Disease

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
Intervention / Treatment
control group
10 individuals get randomised to control group.
short ischemic time
10 individuals get randomised to a controlled coronary occlusion for 30 seconds
Other: coronary occlusion
percutaneous coronary intervention
intermediate ischemic time
10 individuals get randomised to a controlled coronary occlusion for 60 seconds
Other: coronary occlusion
percutaneous coronary intervention
long ischemic time
10 individuals get randomised to a controlled coronary occlusion for 90 seconds
Other: coronary occlusion
percutaneous coronary intervention

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Troponin release
Time Frame: 6 hours
Quantifying troponin T and I release after ischemic event
6 hours

Collaborators and Investigators

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

Sponsor

Herlev Hospital

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 (Actual)

October 5, 2016

Primary Completion (Actual)

September 30, 2017

Study Completion (Actual)

October 1, 2017

Study Registration Dates

First Submitted

June 20, 2017

First Submitted That Met QC Criteria

June 28, 2017

First Posted (Actual)

June 29, 2017

Study Record Updates

Last Update Posted (Actual)

February 22, 2018

Last Update Submitted That Met QC Criteria

February 20, 2018

Last Verified

February 1, 2018

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • H-16027749

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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