Detection of Myocardial Ischemia With a Computer-Assisted 12-lead 24-hour ECG Monitoring System(EAGLE)in Patients With Suspected Unstable Angina

概要

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This study was undertaken to evaluate the diagnostic value of a new device, the 'EAGLE' computer-assisted multiple-lead long-term electrocardiography(ECG)monitoring and analyzing system, in patients with suspected unstable angina, and to compare the results with the Holter monitor. A total of 101 patients with a history of suspected unstable angina underwent a simultaneous 24-h examination with the EAGLE and 2-channel Holter monitors. The diagnosis of unstable angina was established in 70 patients:41 had significant organic stenosis, and 29 had coronary spasm. Ischemic ST deviations were detected 229 times in 44 patients(62.9%)with the EAGLE system and 101 times in 20 patients(28.6%)with the Holter monitor. The sensitivity of myocardial ischemia in unstable angina with the EAGLE system was significantly higher than that with Holter monitor(62.9 vs 28.6%, p<0.05). The difference of sensitivity was due mainly to the low detection rate of the Holter monitor for asymptomatic myocardial ischemia(EAGLE vs Holter;187 times vs 72 times)and myocardial ischemia in the infero-posterior area in patients with organic stenosis(30 times vs none). It is concluded that the EAGLE system is a sensitive tool for the diagnosis of unstable angina in patients without significant ECG changes, and an excellent tool for evaluating silent myocardial ischemia or myocardial ischemia of the infero-posterior area.
社団法人日本循環器学会の論文
1998-07-20