Continuous 12-lead electrocardiographic ST monitoring and long-term prognosis after successful coronary stenting.

BACKGROUND: The possible long-term prognostic value of transient ST ischemic episodes detected by continuous multilead electrocardiographic (ECG) monitoring after successful coronary stenting (CS) has not been thoroughly investigated. METHODS: A total of 739 consecutive patients, who underwent a 24-hour, continuous 12-lead electrocardiographic (ECG) ST monitoring in the first day after successful CS, were studied. An ST ischemic episode was defined as a transient ST shift (depression or elevation) in any lead of > or = 0.10 mV compared with the reference ECG lasting for > or = 1 minute. RESULTS: The incidence of the composite of death, nonfatal myocardial infarction, and recurrent angina by the first year was 28.7%. Patients with > or = 3 (defined by receiver operating characteristics analysis) ST ischemic episodes, detected by continuous 12-lead ECG ST monitoring, were at significantly higher risk for the 1-year composite primary end point than those with either 1 and 2 (52.7% vs 25.7%, hazard ratio [HR] 2.1, 95% CI 1.4-3.7, P < .001) or no (52.7% vs 25%, HR 2.2, 95% CI 1.2-2.9, P < .001) ST ischemic episodes. By multivariate Cox regression analysis, the occurrence of > or = 3 ST ischemic episodes in the first postprocedural day was independently associated with a significant increased risk of the 1-year composite primary end point (HR 1.9, 95% CI 1.4-3.9, P = .002). CONCLUSIONS: The present study suggests that continuous 12-lead ECG ST monitoring in the first day after successful CS may serve as an affordable tool for the identification of patients with an increased risk of fatal or nonfatal ischemic complication during the first year after the procedure.

Association of inflammatory biomarkers and cardiac troponin I with multifocal activation of coronary artery tree in the setting of non-ST-elevation acute myocardial infarction.

We evaluated the possible association of the serum levels of C-reactive protein (CRP), serum amyloid A (SAA), fibrinogen, and cardiac troponin I (cTnI) with the presence of complex angiographic characteristics throughout the coronary artery tree in 519 consecutive patients with non-ST-elevation acute myocardial infarction (NSTEMI). Blood samples were obtained in the first 12h of NSTEMI invasion and all patients underwent in-hospital coronary angiography. Coronary lesions were classified as complex lesion (CL) or non-CL according to Ambrose criteria. Serum levels of CRP (p<0.001), SAA (p<0.001), or fibrinogen (p=0.001), but not of cTnI (p=0.9), were significantly related to the presence of multiple (> or =2) CLs. On the contrary, serum levels of cTnI (p<0.001), but not of CRP (p=0.5), SAA (p=0.9), or fibrinogen (p=0.9), were significantly associated with the severity of coronary artery disease. The results of the present study suggest that elevated levels of inflammatory biomarkers are associated with a generalized activation of coronary artery tree while elevated cTnI levels are associated with the severity of coronary artery disease in the setting of NSTEMI. It seems that inflammatory biomarkers and cTnI reflect different aspect of the process involved in unstable coronary artery disease.