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Early monitoring of serum cardiac troponin I for assessment of coronary reperfusion following thrombolytic therapy.

Abstract：

:The authors report the use of cardiac troponin I (cTnI) for the early, noninvasive determination of coronary reperfusion following thrombolytic therapy. Cardiac troponin I, creatine kinase (CK)-MB, and myoglobin concentrations were measured in early serum specimens at 30, 60, and 90 minutes after initiation of therapy (0 minutes) in 25 consecutive patients given front-loaded rt-PA during acute myocardial infarction. Angiography, determined at 90 minutes after therapy, was used to classify patients as follows: group I (n = 17) reperfusion (TIMI flow grade 2, 3); and group 2 (n = 8) absence of reperfusion (TIMI flow grade 0, 1). The authors calculated the ratio increase in cTnI (delta cTnI), CK-MB (delta CK-MB), and myoglobin (delta myoglobin) 90 minutes after therapy in group 1 and 2. Serum cTnI, CK-MB and myoglobin concentrations significantly increased at 60 and 90 minutes in group 1, but not in group 2. Delta cTnI, delta CK-MB, and delta myoglobin levels were significantly increased in group 1 versus group 2 at 90 minutes. Further, delta cTnI was significantly greater at 90 minutes within group 1 compared to delta CK-MB and delta myoglobin. The sensitivity for detecting reperfusion at 90 minutes angiography using threshold values of 6.0 for delta cTnI, 7.0 for delta CK-MB, and 5.0 for delta myoglobin were: delta cTnI 82.4%; delta CK-MB 64.7%; delta myoglobin 76.5%; respectively. This study indicates that early serial measurements of cTnI were a more accurate predictor of early coronary artery reperfusion 90 minutes after thrombolytic therapy compared to CK-MB and myoglobin. Larger population studies will be necessary to confirm these finding.

journal_name

Am J Clin Pathol

journal_title

American journal of clinical pathology

authors

Apple FS,Henry TD,Berger CR,Landt YA

doi

10.1093/ajcp/105.1.6

subject

Has Abstract

pub_date

1996-01-01 00:00:00

pages

6-10

issue

1

eissn

0002-9173

issn

1943-7722

journal_volume

105

pub_type

临床试验,杂志文章

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