Early Assessment of Reperfusion Therapy in Acute Myocardial Infarction Using Cardiac Troponin-T.
10.4070/kcj.1995.25.1.36
- Author:
Young Cheoul DOO
;
Hyun Soo KIM
;
Young Il SEO
;
Rok Yun LEE
;
Jae Myung LEE
;
Eun Chul SHIN
;
Soon Hee KOH
;
Chong Yun RIM
;
Young Bahk KOH
;
Young LEE
;
Jeong Bae PARK
- Publication Type:Original Article
- Keywords:
Cardiac Troponin-T;
Reperfusion;
Acute myocardial infarction
- MeSH:
Biomarkers;
Chest Pain;
Emergencies;
Humans;
Myocardial Infarction*;
Myocardial Reperfusion;
Reperfusion*;
Research Personnel;
Sensitivity and Specificity;
Troponin T*
- From:Korean Circulation Journal
1995;25(1):36-43
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND: An earlier index of reperfusion is desirable to determine whether additional therapy is necessary for myocardial salvage. Using the washout phenomenon of biochemical markers, many investigator have reported noninvasive methods for detection coronary reperfusion in patients with acute myocardial infarction. Recently cardiac Troponin-T has been developed as a new myocardial specific marker, especially myocardial damage. The object of this study is to investigate the utility of cardiac Troponin-T for early assessment of reperfusion therapy. METHODS: The study group comprised 10 patients with acute myocardial infarction and reperfusion therapy that was initiated within 6 hours after the onset of symptoms. Blood samples were taken before treatment, every 30 min interval for 3 hours and then 6, 24, 72 hours after the onset of reperfusion therapy to measuring Troponin-T, Creatin Kinase(CK), and CK-MB level. Serum concentration of cardiac Troponin-T level was measured with immunoassed using ES-300, Boehringer Mannheim. We compared the real reperfusion that was assessed by coronary angiogram, chest pain disappearence and resolusion of St-segment elevation with an index of coronary reperfusion, the increase in Troponin-T(big up tri, open Troponin-T) 60, 90 min after repefusion therapy(Successful Reperfusion Index : Tn-T 60(90)-0>0.3 ng/ml) and the sensitivity, specificity, Positive, and negative predictive value were calculated using this threshold(Successful Reperfusion Index). RESULTS: 1) The studied patients(M/F : 7/3, mean age 54+/-12 year) were treated within 3 hour with thrombolytic therapy(7 patients, t-PA) or emergency angioplasty(3 patients). 2) The cardiac Troponin-T levels in eight patients with successful reperfusion showed early peak within 24 hours after reperfusion therapy were initiated but in 2 patients without successful reperfusion showed sustained increase without early peak within 24 hours. The CK-MB levels in patients with successful reperfusion also showed early peak within 24 hours but 5 of 8 patients showed no significant increase until 2 hours after reperfusion therapy. 3) The sensivity, specificity, positive and negative predictive value for detecting reperfusion using a threshold value of 0.3 ng/ml of big up tri, open Troponin-T 90 min(60 min) after reperfusion therapy was 100%(56%), 50(100%), 89%(100%), and 100%(20%), respectively. CONCLUSION: Serial measurements of cardiac Troponin-T, especially reperfusion index(0.3 ng/ml of big up tri, open Troponin-T 90 min after reperfusion therapy) are useful for early assessment of reperfusion therapy in acute myocardial infarction.
