Iranian Heart Association Iranian Heart Journal 18 1 2017 03 01 Comparison of the Coronary Vessel Diameter During and After Primary Percutaneous Intervention in Patients with Acute Myocardial Infarction 25 29 82755 EN Farshad Shakerian Cardiovascular Intervention Research Center, Rajaie Cardiovascular, Medical, and Research Center, Iran University of Medical Sciences, Tehran, I.R. Iran Roya Rezai Rajaie Cardiovascular, Medical, and Research Center, Iran University of Medical Sciences, Tehran, I.R. Iran Fatemeh Shiokhi Rajaie Cardiovascular, Medical, and Research Center, Iran University of Medical Sciences, Tehran, I.R. Iran Ata Firouzi Cardiovascular Intervention Research Center, Rajaie Cardiovascular, Medical, and Research Center, Iran University of Medical Sciences, Tehran, I.R. Iran Hamidreza Sanati Cardiovascular Intervention Research Center, Rajaie Cardiovascular, Medical, and Research Center, Iran University of Medical Sciences, Tehran, I.R. Iran Ali Zahedmehr Cardiovascular Intervention Research Center, Rajaie Cardiovascular, Medical, and Research Center, Iran University of Medical Sciences, Tehran, I.R. Iran Reza Kiani Cardiovascular Intervention Research Center, Rajaie Cardiovascular, Medical, and Research Center, Iran University of Medical Sciences, Tehran, I.R. Iran Omid Shafe Cardiovascular Intervention Research Center, Rajaie Cardiovascular, Medical, and Research Center, Iran University of Medical Sciences, Tehran, I.R. Iran Samaneh Ahmadi Rajaie Cardiovascular, Medical, and Research Center, Iran University of Medical Sciences, Tehran, I.R. Iran Journal Article 2019 02 15 Background: An increase in the plasma levels of catecholamines and other neurohormones after<br />acute myocardial infarction (AMI) leads to coronary vasoconstriction and may cause the<br />undersizing of stents during primary percutaneous coronary intervention (PCI) in STsegment elevation myocardial infarction (STEMI). We aimed to compare the reference<br />vessel diameter of the infarct-related artery during and after primary PCI in patients with<br />AMI.<br />Methods: This prospective interventional study was performed on 43 consecutive patients with<br />STEMI (TIMI flow grade III), who were candidated for primary PCI. The main proximal<br />diameter of the coronary artery (reference vessel diameter) was assessed at baseline and also<br />3 days to 3 months after 2nd angiography. The study end point was to compare the reference<br />vessel diameter within and after primary PCI.<br />Results: Comparison between the mean diameter of the involved coronaries after PCI and the mean<br />diameter during the procedure showed a significant increase in the real size of the right<br />coronary artery (RCA) and a slight decrease in the size of the left circumflex artery (LCx).<br />However, the mean sizes of the left anterior descending coronary artery remained<br />insignificant. The decrease in the LCx diameter and inversely the increase in the RCA<br />diameter remained significant in the study population even after adjusting cardiovascular<br />risk factors as potential confounders.<br />Conclusions: The changes in the diameter of the reference coronary arteries, namely an increase in<br />the RCA diameter and a decrease in the LCx diameter, are expected following primary PCI<br />in patients with STEMI. https://journal.iha.org.ir/article_82755_59b56df526623711cec52969c5d5cfe9.pdf