![]() The results of the ECGs were examined by two independent experts who were blinded to the groups. A standard 12-lead ECG was logged at 25 mm/sec and calibrated at 10 mV/mm. For patients who died within the last year, the most recent ECGs recorded in the system were taken as a basis. The data of patients who died within one year were based on the last TTE recorded in the system.īased on the medical records, ECGs of all patients were recorded at admission, 90 minutes after PCI, and the first-year visit. The study design was presented to the local ethics committee of our hospital and the necessary approval was obtained.Īll patients underwent transthoracic echocardiography (TTE) (Vivid 7 GE Medical System, Horten, Norway) during the first-year visit, and LVEF was determined using the Simpson’s method. The patients were admitted to the coronary care unit after angioplasty and were given routine anti-thrombotic therapy of aspirin (100 mg) and clopidogrel (75 mg) daily. 43.3 ± 10.5 respectively, p 250 seconds) was adjusted according to operator preference. The degree of LVEF was significantly greater in the RQ group and NQ group than in the PQ group [(47.5 ± 10.1 vs. Results: There were 502 (32%) patients with persistent Q waves (PQ group), 509 (33%) patients with Q wave regression (RQ group), and 542 (35%) patients with non-Q wave MI (NQ group). The study population was divided into three groups as the Q wave regression group, the Q wave persistent group, and the non-Q wave MI group. ECGs were recorded before and 90 min after PCI, as well as at hospitalization discharge and 12 months of follow-up. Patients and Methods: Standard 12-lead electrocardiograms (ECGs) were recorded in 1553 patients, who presented to our hospital with chest pain and underwent primary percutaneous coronary intervention (p-PCI) with the diagnosis of STEMI and were retrospectively analyzed. Our main objective was to assess the association of pathological Q wave evolution after reperfusion with clinical outcomes after ST-elevation myocardial infarction (STEMI). ![]() ![]() There are limited data regarding the association between Q wave regression and clinical outcomes. Introduction: Pathological Q waves are correlated with infarct size, and Q wave regression is associated with left ventricular ejection fraction improvement. Keywords: ST-elevation myocardial infarction Q wave regression primary percutaneous coronary intervention Abstract Zeki Şimşek, Sedat Kalkan, Regayip Zehir, Elnur AlizadeĬlinic of Cardiology, Kartal Koşuyolu High Specialization Training and Research Hospital, İstanbul, Türkiye Regression of Q Waves and Clinical Outcomes After Primary Percutaneous Coronary Intervention in St Elevation Myocardial Infarction
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