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Clinical Trial Summary

To determine if selected circulating blood factors that reflect enhanced thrombogenesis are associated with an increased incidence of recurrent coronary events, including cardiac death or non-fatal myocardial infarction.


Clinical Trial Description

DESIGN NARRATIVE:

In this multicenter, collaborative, prospective study, patients hospitalized with a myocardial infarction were enrolled from ten geographically dispersed centers. Five thrombogenic- related blood factors were quantitated, and formed the centerpiece of this study: 1) lipoprotein(a) [Lp(a)] - a quantitative genetic factor that contains apolipoprotein B, has a structural homology to plasminogen, interferes with intrinsic thrombolytic activity, and represents a crossover link in the thrombogenesis/atherogenesis hypothesis; 2) soluble fibrin - a system indicator of coagulation activity in the ongoing conversion of fibrinogen to insoluble fibrin strands; 3) plasminogen activator inhibitor-1 (PAI-1) - an important regulator of the fibrinolytic system, it interferes with intrinsic t-PA activity; 4) coagulation Factor VII -high levels lead to increased thrombogenesis and have been associated with an increased risk of ischemic heart disease; and- 5) von Willebrand factor - it binds to platelet glycoproteins, contributes to local thrombus formation, and it is elevated in patients at increased risk of coronary thrombosis.

The primary analysis utilized a time-dependent survivors hip model (Cox regression) to determine the presence or absence of an association between one or more of these factors and subsequent thrombotic-related coronary events. Secondary objectives included: 1) to determine if there was a statistical association between the thrombogenic factors and conventional hematologic/lipid parameters, and to evaluate their interactions regarding coronary events; and 2) to determine if thrombogenic factors had uniform effects on coronary event rates across various subgroups. ;


Study Design

N/A


Related Conditions & MeSH terms


NCT number NCT00005358
Study type Observational
Source University of Rochester
Contact
Status Completed
Phase N/A
Start date April 1994
Completion date March 1999

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