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Influence of Thrombolytic Therapy on Inferior Acute Myocardial Infarction with Concomitant Anterior ST Segment Depression

Via Catania 99 00161 Roma Italy

Francesco Gori, MD

S. Vincenzo Clinic-ASL RM D

Adriano Pellicelli, MD

L. Spallanzani Hospital, Rome, Italy

Donatella Curcio, MD

Via Catania 99 00161 Roma Italy

Marco Lionetti, MD

Via Catania 99 00161 Roma Italy

Paola Assunta Buccarella, MD

Via Catania 99 00161 Roma Italy

Mara Lucidi, MD

Via Catania 99 00161 Roma Italy

The purposes of this study were to analyze the prognostic significance of precordial ST segment depression and to determine whether thrombolytic therapy is effective for all patients with inferior acute myocardial infarction (AMI) or whether there is a different effectiveness for patients with concomitant anterior ST segment depression persisting for 24 hours or longer. Medical charts of 176 patients were studied. On the basis of ECG the patients were subclassified into three groups according to the presence, persistence, or absence of significant ST segment depression: Group 1: anterior ST segment depres sion persisting for less than 24 hours (45.4%); Group 2: anterior ST segment depression persisting for more than 24 hours (17.6%); Group 3: no anterior ST segment depression (37%). Age, Killip class, peak creatine kinase, hospital deaths, left ventricular ejection fraction, regional wall motion score, postinfarction angina, and ventricular/supra ventricular arrhythmia of all patients were studied. Parameters of the three groups were compared: worse results were found in group 1 and the worst in group 2. This result is (continued on next page) (Abstract continued) independent of thrombolytic therapy. Finally, the same parameters of thrombolyzed and nonthrombolyzed groups were compared: no statistically significant difference was observed. Among thrombolyzed patients the number of those with ST depression lasting more than 24 hours is lower than in nonthrombolyzed patients. It can be assumed that thrombolytic therapy in inferior AMI determines a shifting of patients from a worse prognosis group (ST segment depression persisting for more than 24 hours) to a better prognosis group (ST segment depression persisting for less than 24 hours).

Angiology, Vol. 50, No. 8, 619-628 (1999)
DOI: 10.1177/000331979905000802


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