Back to Search
Start Over
Use of High-Sensitivity Cardiac Troponin for the Exclusion of Inducible Myocardial Ischemia
- Source :
- Annals of Internal Medicine. 169:751
- Publication Year :
- 2018
- Publisher :
- American College of Physicians, 2018.
-
Abstract
- Background Many patients with coronary artery disease (CAD) are routinely referred for surveillance stress testing despite recommendations against it. Objective To determine whether low levels of resting high-sensitivity cardiac troponin I (hs-cTnI) can identify persons without inducible myocardial ischemia. Design Observational study. Setting A university-affiliated hospital network. Patients Persons with stable CAD: 589 in the derivation group and 118 in the validation cohort. Measurements Presence of inducible myocardial ischemia was determined by myocardial perfusion imaging with technetium-99m single-photon emission computed tomography during either treadmill or pharmacologic stress testing. Resting plasma hs-cTnI was measured within 1 week of the stress test, and the negative predictive value (NPV) for inducible ischemia was calculated. The derivation cohort was followed for 3 years for incident cardiovascular death and myocardial infarction. Results In the derivation cohort, 10 of 101 patients with an hs-cTnI level below 2.5 pg/mL had inducible myocardial ischemia (NPV, 90% [95% CI, 83% to 95%]) and 3 of 101 had inducible ischemia involving at least 10% of the myocardium (NPV, 97% [CI, 92% to 99%]). In the validation cohort, 4 of 32 patients with an hs-cTnI level below 2.5 pg/mL had inducible ischemia (NPV, 88% [CI, 71% to 96%]) and 2 of 32 had ischemia of 10% or greater (NPV, 94% [CI, 79% to 99%]). After a median follow-up of 3 years in the derivation cohort, no adverse events occurred in patients with an hs-cTnI level below 2.5 pg/mL, compared with 33 (7%) cardiovascular deaths or incident myocardial infarctions among those with an hs-cTnI level of 2.5 pg/mL or greater. Limitation The data may not be applicable to a population without known CAD or to persons with unstable angina, and the modest sample sizes warrant further validation in a larger cohort. Conclusion Very low hs-cTnI levels may be useful in excluding inducible myocardial ischemia in patients with stable CAD. Primary funding source National Institutes of Health.
- Subjects :
- Male
medicine.medical_specialty
Population
Myocardial Ischemia
Ischemia
030204 cardiovascular system & hematology
Coronary artery disease
03 medical and health sciences
Myocardial perfusion imaging
0302 clinical medicine
Predictive Value of Tests
Internal medicine
Internal Medicine
medicine
Humans
cardiovascular diseases
030212 general & internal medicine
Myocardial infarction
education
Aged
Tomography, Emission-Computed, Single-Photon
education.field_of_study
medicine.diagnostic_test
Unstable angina
business.industry
Troponin I
Myocardial Perfusion Imaging
Technetium
General Medicine
Middle Aged
medicine.disease
Cohort
Exercise Test
Cardiology
Female
Radiopharmaceuticals
business
Biomarkers
Follow-Up Studies
Cohort study
Subjects
Details
- ISSN :
- 00034819
- Volume :
- 169
- Database :
- OpenAIRE
- Journal :
- Annals of Internal Medicine
- Accession number :
- edsair.doi.dedup.....37b1a3ea858340f15d2cf247aa857f1b