ECG criteria of LVH as predictor of slow-flow/NO Reflow after PCI in Patients with chronic stable angina

Abstract

Chronic angina can be one of the symptoms of left ventricle enlargement. Left ventricular hypertrophy indicates enlargement of the left ventricle and indicates that there are more masses and cells in the left ventricle, so greater action potential leads to larger vectors and ECG amplitude. Left ventricle has also been suggested as a reason for poor blood flow or improper blood flow after PCI in patients with left ventricular hypertrophy. Therefore, we decided to evaluate the ECG criteria of LVH as a predictor of slow-flow/NO Reflow after PCI in Patients with chronic stable angina. Methods: In this retrospective study, 159 patients with chronic stable angina with no previous history of MI who were candidates for PCI were enrolled. The coronary angiography of the patients was interpreted by one of the intervention professors who was completely blind to the records of the patients and the patients were divided into three groups based on TIMI system: Normal Flow, Slow Flow and No-Reflow. Also, all ECG criteria for LVH were reviewed by a professor who was completely blind to the study and the results were recorded in a research checklist. Then the obtained results were analyzed using SPSS software version20. Results: In the positive LVH Criteria results, 21 patients (35.0%) were Sokolow-Lyon criteria, 32 patients (53.33%) were Cornell voltage criteria, 49 patients (81.67%) were SD + SV4. Blood flow after PCI in 2 patients (1.25%) was NO Reflow, 24 patients (15.1%) had slow flow and 133 patients (83.6%) were normal. In this study, a significant relationship was seen between the heart axis and the criteria of left ventricular hypertrophy with the occurrence of No-Reflow or Slow-Flow phenomenon. And left ventricular hypertrophy (61.54% sensitivity and 66.92% specificity) was a predictor of No-Reflow or Slow-Flow phenomenon in patients with chronic stable angina.