March 1, 2003Clinical ChemistryOpen Access

Release of Macromolecular Cardiac Troponin I Complex after Successful Percutaneous Transluminal Coronary Angioplasty in Acute Myocardial Infarction

Q: What is the clinical evidence from this study?

Study design: Observational. Population: Acute myocardial infarction (AMI) (n=11). Intervention: Successful primary percutaneous transluminal coronary angioplasty (PTCA). Primary outcome: Release characteristics and identification of cTnI forms (free, complexed, and degraded cTnI).

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Key result

Successful primary PTCA in acute myocardial infarction patients results in the release of a macromolecular 440-kDa cTnI complex into the circulation that disappears within 72 hours.

Population

11 acute myocardial infarction patients with occluded RCA or LAD presenting within 6 h of chest pain onset…

Design

Case_series

Follow-up

72 hours

Authors

ALAlain LavoinneInserm BCB CauliezUniversité de Rouen Normandie HEHélène EltchaninoffInterventional Cardiology

Discussion

Member takes

Implication

May affect cTnI assay interpretation after reperfusion; leaves open whether diagnostic thresholds need adjustment in larger studies.

Study Design

Type

Observational (n=11)

Structured PICO

Population

11 patients aged 51 to 80 years with acute myocardial infarction who underwent successful primary PTCA within 6 hours of chest pain onset.

Exposure

Primary percutaneous transluminal coronary angioplasty (PTCA) with stenting and standardized adjunctive therapy (abciximab, heparin, clopidogrel, and aspirin).

Outcome

Release characteristics and identification of cTnI forms (free, complexed, and degraded cTnI) measured by fast protein liquid chromatography (FPLC) up to 72 hours post-PTCA.surrogate

A macromolecular cTnI complex of ~440 kDa is released into the circulation following successful reperfusion in AMI patients, which may impact the interpretation of commercial cTnI assays.

Limitations

Experimental conditions used cannot separate binary and ternary complexes with high resolution.
Antibodies used may be unable to recognize degraded cTnI forms.
Further characterizations are required to determine if cTnT is complexed with cTnI.
Experimental conditions cannot separate with high resolution binary and ternary complexes
Antibodies used may not recognize degraded cTnI forms

Cite This Study

Lavoinne et al. (2003) conducted an observational in Acute myocardial infarction (AMI) (n=11). Successful primary percutaneous transluminal coronary angioplasty (PTCA) was evaluated on Release characteristics and identification of cTnI forms (free, complexed, and degraded cTnI). Successful primary PTCA in acute myocardial infarction patients results in the release of a macromolecular 440-kDa cTnI complex into the circulation that disappears within 72 hours.

synapsesocial.com/papers/6a9e38458dd5fc7fdbd6fcbf https://doi.org/10.1373/49.3.505

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Release of Macromolecular Cardiac Troponin I Complex after Successful Percutaneous Transluminal Coronary Angioplasty in Acute Myocardial Infarction

Discussion

Member takes

Implication

Study Design

Structured PICO

Limitations

Cite This Study

Release of Macromolecular Cardiac Troponin I Complex after Successful Percutaneous Transluminal Coronary Angioplasty in Acute Myocardial Infarction

Discussion

Member takes

Implication

Study Design

Structured PICO

Limitations

Cite This Study

Also Consider

Also Consider