Assessment of left ventricular function using serum cardiac troponin I measurements following myocardial infarction
| Autor: | Alireza Falahati, Fred S. Apple, Maryann Murakami, Dane Christensen, Naheed Mitha, Scott W. Sharkey |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
medicine.medical_specialty
Cardiac troponin Clinical Biochemistry Myocardial Infarction Chest pain Biochemistry Ventricular Function Left Internal medicine Troponin I medicine Humans cardiovascular diseases Myocardial infarction Creatine Kinase Ultrasonography Ejection fraction Ventricular function biology business.industry Myocardium Biochemistry (medical) General Medicine Infarct size medicine.disease Troponin Isoenzymes cardiovascular system Cardiology biology.protein medicine.symptom business Biomarkers |
| Zdroj: | Clinica chimica acta; international journal of clinical chemistry. 272(1) |
| ISSN: | 0009-8981 |
| Popis: | The prognosis and extent of injury to the myocardium have previously been assessed by increased serum creatine kinase (CK) MB levels. We report findings from 39 consecutive, acute myocardial infarction (AMI) patients presenting 4.5 h (range, 0.7-12.1 h) after the onset of chest pain. We compared CK MB mass (upper reference limit, 5.0 ng/ml) and cardiac troponin I (cTnI; upper reference limit, 0.8 ng/ml) (Stratus II, Dade International) in serial serum specimens obtained over 36 h after chest pain from AMI patients; within 6 h after onset of chest pain. While the appearance of the kinetics of CK MB and cTnI were similar during the initial 24 h following the onset of chest pain, cTnI was increased significantly (p < 0.05) over CK MB after 9 to 12 h. Half-life determinations (mean+/-S.D.) in 22 of the 39 AMI patients demonstrated a significantly (p < 0.01) shorter half-life in non-Q-wave infarcts [t1/2 6.8 h (+/-5.6)] vs. Q-wave infarcts [t1/2 20.4 h (+/-10.7)]. Further serial time versus marker (mean+/-S.D.) results were significantly correlated (p < 0.001, r = 0.66). Sixteen of twenty patients assessed by echocardiography had an abnormal left ventricular ejection fraction (LVEF); mean 37.6 (S.D. 15.2)%, ranging from 15.4 to 67.6%. LVEF was significantly and inversely correlated to peak CK MB (r = .50, p = 0.03), as well as to peak cTnI (r = 0.46, p = 0.04). Based on these findings, cTnI shows excellent promise as a useful marker of infarct size, for the assessment of left ventricular function, and may potentially replace CK MB as the cardiac-specific marker for AMI detection. |
| Databáze: | OpenAIRE |
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