Association of PeriOPerative Aspirin-ResisTance and CardioVascular Outcome (POPART-CVO)

August 15, 2019 updated by: Jan Larmann, University Hospital Heidelberg
The aim of our study is to investigate the association between perioperative aspirin resistance and Myocardial Injury after Non-cardiac Surgery (MINS) in patients undergoing vascular surgery.

Study Overview

Status

Unknown

Conditions

Detailed Description

Because of new surgical techniques, advanced monitoring modalities and improvements in perioperative care, perioperative mortality and morbidity have been significantly reduced in the last decades; however, patients still suffer from high perioperative mortality and morbidity, especially those with pre-existing cardiovascular diseases. Not only perioperative myocardial infarction but also myocardial injury after non-cardiac surgery, which presents without clinical symptoms, is associated with an adverse outcome. Possibilities to preoperatively identify patients at cardiovascular risk are limited and prophylactic interventions are not yet established or controversial.

Aspirin is used for primary and secondary prevention in cardiovascular diseases. New-onset increased platelet function on aspirin treatment (aspirin resistance) has been demonstrated in cardiac and vascular surgery. Yet, it has not been investigated whether a new perioperative aspirin resistance is associated with higher risk of myocardial injury after non-cardiac surgery (MINS) and cardiovascular events.

The aim of this study is to evaluate a potential association between new-onset aspirin resistance and MINS in patients undergoing vascular surgery. If there is an association of perioperative aspirin resistance and MINS during vascular surgery, the detection of perioperative aspirin resistance could be used as perioperative risk stratification tool in order to improve clinical risk stratification and reduce perioperative morbidity and mortality.

Therefore, 220 patients treated with aspirin and scheduled for vascular surgery will be recruited. Blood will be drawn at predefined time points before surgery and up to three days postoperatively. Aspirin resistance will be measured by Multiplate Analyzer prior to surgery, one hour after skin-incision, four hours after surgery and on post-OP days one and two. Adverse cardiovascular events will be recorded until 30 days post-OP. ECGs will be recorded preoperatively and on post-OP day 3. High-sensitive cardiac Troponin T will be measured prior to surgery and on post-OP days one to three. Patient charts will be screened and a telephone interview will be performed to detect cardiovascular events after discharge until post-OP day 30.

Study Type

Observational

Enrollment (Anticipated)

220

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

    • Baden-Württemberg
      • Heidelberg, Baden-Württemberg, Germany, 69120
        • Department of Anaesthesiology, University Hospital Heidelberg

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

14 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients on aspirin treatment, admitted to University Hospital Heidelberg and scheduled for vascular surgery.

Description

Inclusion Criteria:

  • 18 years or older
  • Preoperative aspirin treatment at least 14 days prior to surgery
  • Elective vascular surgery
  • In-patient treatment
  • Informed consent

Exclusion Criteria:

  • 17 years of age or younger
  • Known pregnancy or breastfeeding
  • Missing informed consent
  • Ambulatory or day-case surgery
  • Emergency surgery
  • Current clopidogrel or non-steroidal anti-inflammatory drug treatment
  • Preoperative aspirin resistance
  • Current thrombocytopenia (<100000 platelet/µl)
  • Liver or renal failure (GOT/GPT and/or creatinine increased >2-fold)
  • Entity which is part of the composite endpoint diagnosed within past 28 days
  • Angiography without surgical intervention

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

  • Observational Models: Cohort
  • Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Myocardial Injury after Non-cardiac Surgery
Time Frame: 30 days postoperative
Number of participants with MINS defined as raise in postoperative hs-cTNT (high sensitivity cardiac troponin T) judged due to myocardial ischemia detected at postoperative visits, documented in patient chart or detected during telephone interview after 30 postoperative days.
30 days postoperative

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Peripheral vascular occlusion
Time Frame: 30 days postoperative
Diagnosed by a radiologist based on the results of duplex ultrasonography, angiography or CT-angiography.
30 days postoperative
Congestive heart failure
Time Frame: 30 days postoperative
Number of participants with congestive heart failure according to European Perioperative Clinical Outcome (EPCO) definitions
30 days postoperative
Myocardial Ischemia
Time Frame: 30 days postoperative
Number of participants with myocardial ischemia defined as new electrocardiographic detection of myocardial ischemia in ECG and/or documented in patient charts which will be screened up to 30 postoperative days and/or detected during telephone interview after 30 postoperative days
30 days postoperative
Composite of Cardiovascular Events
Time Frame: 30 days postoperative
Number of participants with Cardiovascular Events defined as occurrence of Cardiac Death and/or Myocardial Ischemia and/or Myocardial Infarction and/or Embolic Stroke and/or Thrombotic Stroke recorded until postoperative day 30. Definitions according to European Perioperative Clinical Outcome-(EPCO) detected at postoperative visits, documented in patient chart or detected during telephone interview after 30 postoperative days
30 days postoperative
Mesenteric ischemia
Time Frame: 30 days postoperative
Diagnosed by a radiologist based on the results of angiography or CT-angiography.
30 days postoperative
New-onset atrial fibrillation
Time Frame: 30 days postoperative
Number of participants with new electrocardiographic detection of atrial fibrillation in postoperative ECG and/or documented in patient chart
30 days postoperative
Cardiac death
Time Frame: 30 days postoperative
Number of participants with cardiac death defined as death due to new myocardial infarction or ischemia, or atrial or ventricular arrhythmias, or cardiogenic pulmonary edema, or pulmonary embolism detected at postoperative visits, documented in patient chart or detected during telephone interview after 30 postoperative days
30 days postoperative
Myocardial Infarction
Time Frame: 30 days postoperative
Number of participants with myocardial infarction defined as an increase in serum cardiac biomarker values in combination with symptoms of ischemia or new/presumed new significant ST segment or T wave ECG changes or new left bundle branch block or development of pathological Q waves on ECG. Definition according to European Perioperative Clinical Outcome-(EPCO) detected at postoperative visits, postoperative blood analyses, documented in patient chart or detected during telephone interview after 30 postoperative days
30 days postoperative
Stroke
Time Frame: 30 days postoperative
Number of participants with embolic or thrombotic stroke defined as cerebral event with persistent residual motor, sensory or cognitive dysfunction detected at postoperative visits, documented in patient chart or detected during telephone interview after 30 postoperative days.
30 days postoperative
Length of hospital stay
Time Frame: 30 days postoperative
Documented in patient charts.
30 days postoperative
Length of intensive care unit stay
Time Frame: 30 days postoperative
Documented in patient charts.
30 days postoperative

Collaborators and Investigators

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

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 (Anticipated)

August 1, 2019

Primary Completion (Anticipated)

April 1, 2020

Study Completion (Anticipated)

May 1, 2020

Study Registration Dates

First Submitted

August 9, 2019

First Submitted That Met QC Criteria

August 9, 2019

First Posted (Actual)

August 13, 2019

Study Record Updates

Last Update Posted (Actual)

August 20, 2019

Last Update Submitted That Met QC Criteria

August 15, 2019

Last Verified

August 1, 2019

More Information

Terms related to this study

Other Study ID Numbers

  • S-468/2019

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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