Reply to the letter to the editor: [Letter by Yue J, et al. regarding article 'The relationship between atherogenic index of plasma and noreflow in patients with acute ST segment elevation myocardial infarction who underwent primary percutaneous coronary intervention'].

We have read with a great pleasure the letter of Yue J, et al. to the editor about our recent study which showed an association between atherogenic index of plasma and no-reflow in patients with ST segment elevation myocardial infarction who underwent primary percutaneous coronary intervention. Yue J, et al. raises concerns about the timing of blood collection, whether if it was taken before the emergency intervention or after. In emergency department, while performing intravenous line, the blood samples for blood biochemistry and whole blood count were also taken from the patients. Another concern of the author was the timing of left ventricular ejection fraction measurement (LVEF). LVEF measurements were obtained before the emergency intervention and some were after the intervention, but before the patient discharge. In our study we included the LVEF in our model, because we could not ignore that modeling which was comprehensively used in recent studies on relation of LVEF and no-reflow. We designed this statistical model not only for the no-reflow prediction but also for the explanation of the no-reflow pathophysiology. We thank the authors' letter for pointing out these issues that we hope to have addressed.