Ischemia-modified albumin (IMA) is not useful for detecting myocardial ischemia during symptom-limited exercise
June Hong Kim1, Jae Hoon Choi, Hyun-Kook Lee
1Department of Internal Medicine, Pusan National University Hospital, Busan, Korea.
Insights
Ischemia-modified albumin (IMA) levels did not significantly change during exercise stress tests in patients with coronary artery disease (CAD). These findings indicate IMA has limitations in detecting exercise-induced myocardial ischemia.
Area of Science:
- Cardiology
- Biomarkers
- Diagnostic Tools
Background:
- Coronary artery disease (CAD) is a significant health concern.
- Ischemia-modified albumin (IMA) is a potential biomarker for myocardial ischemia.
- Exercise stress testing is a common diagnostic tool for CAD.
Purpose of the Study:
- To investigate the utility of ischemia-modified albumin (IMA) levels in detecting myocardial ischemia during exercise stress testing in patients with suspected coronary artery disease (CAD).
Main Methods:
- Forty patients with a history of chest pain underwent symptom-limited treadmill exercise stress testing and coronary angiography.
- Serum IMA levels were measured at baseline and 5 minutes post-exercise.
- Patients were categorized into CAD and non-CAD groups based on angiography results.
Main Results:
- No significant differences in baseline or post-exercise IMA levels were observed between the CAD and non-CAD groups.
- The change in IMA levels after exercise did not differ significantly between the groups.
- IMA levels also did not differ significantly between patients with positive and negative exercise ECG test results.
Conclusions:
- Ischemia-modified albumin (IMA) demonstrates limitations in detecting myocardial ischemia during symptom-limited exercise stress tests.
- Further research may be needed to explore other applications or refine the use of IMA as a biomarker for cardiac ischemia.
Background/Aims:
We examined the ischemia-modified albumin (IMA) level during exercise in patients with coronary artery disease (CAD).
Methods:
Forty patients with a history of chest pain underwent both symptom-limited treadmill exercise stress testing and coronary angiography within one week. During the treadmill tests, blood samples were obtained at baseline and 5 min after exercise to measure the serum IMA level.
Results:
Of the 40 patients, fourteen (35%, CAD group) had significant coronary artery stenosis, while the other 26 (65%, non-CAD group) did not. The baseline and post-exercise IMA levels in the two groups did not differ significantly (105.2+/-7.2 vs. 107.7+/-6.7 U/mL at baseline and 93.1+/-10.1 vs. 94.8+/-5.7 U/mL at post-exercise in the CAD and non-CAD groups, p=0.29 and 0.57, respectively). The changes in IMA after exercise did not differ either (-10.4+/-7.5 vs. -14.0+/-7.6 U/mL in the CAD and non-CAD groups, respectively, p=0.10). Similarly, the change in IMA between the exercise ECG test positive (TMT positive, n=9) and negative (TMT negative, n=20) groups did not differ (-14.63+/-5.19, vs -8.50+/-9.01 U/mL, p=0.15, in the TMT positive and negative groups, respectively).
Conclusions:
Our results suggest that IMA has limitation in detecting myocardial ischemia during symptom-limited exercise stress tests.
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