Abstract
To investigate whether the fragmented QRS (fQRS) complexes can be used to distinguish patients with early non-ST elevation myocardial infarction (NSTEMI) from those with unstable angina (UA). fQRS complex has been found to be linked to myocardial infarction and cardiac death. The clinical data of 302 patients who had been diagnosed with coronary artery disease were retrospectively reviewed. Incidence of fQRS complex within 48 h of presentation was analyzed and patients with acute myocardial infarction (AMI) (n = 240) were followed up by telephone interviews for a mean of 61.47 (range, 59.60-63.35) months. Patients with NSTEMI exhibited higher incidence of fQRS than those with UA (p = 0.047). The incidence of fQRS in the inferior wall leads was significantly higher than that of other leads in patients with anterior wall infarction (p < 0.05). Kaplan-Meier analysis revealed a higher mortality rate in AMI patients with fQRS compared to non-fQRS patients (p = 0.001). Presence of fQRS complexes within 48 hours of presentation may be used to differentiate NSTEMI patients from UA patients. fQRS may also be used as a survival predictor for patients with AMI.
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