Is the Beneficial Effect of Preinfarction Angina Related to an Immune Response?

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Immune-mediated mechanisms are thought to play a key role in the development of coronary artery disease and its thrombotic complications. Preinfarction angina has been suggested to improve left ventricular function and short-term outcomes. The purpose of the present study was to investigate the relation between the immune response and in-hospital clinical course in preinfarction angina. We prospectively evaluated 93 patients. Forty-three patients exhibited preinfarction angina within 24 hours before the onset of acute myocardial infarction (AMI) (preinfarction angina group) and 50 patients were free from preinfarction angina (sudden onset group). The incidence of complications (heart failure, recurrent angina, arrhythmia and coronary interventions) and in-hospital mortality were assessed in the two study groups. We detected some immune markers, including white blood cells, C-reactive protein, immunoglobulins, and complement. White blood cells and CRP were significantly lower in the preinfarction angina group than in the sudden onset group (P < 0.001, P < 0.005, respectively). Conversely, IgE and C4 were significantly higher in the preinfarction angina group than in the sudden onset group (P < 0.001, P < 0.001, respectively). The incidences of heart failure and severe arrhythmias were lower in the preinfarction group than in the sudden onset group (P < 0.005, P < 0.05 respectively). The beneficial effect of preinfarction angina may be associated with an immune-inflammatory response modified by a brief ischemic episode.
International Heart Journal刊行会の論文

Is the Beneficial Effect of Preinfarction Angina Related to an Immune Response?

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