METHODS
TIMI, NSTEMI, Major branch occlusion, ST-elevation myocardial infarction, stenosis
MYOCARDIAL INFARCTION, LBBB, -11, LEFT BRANCH BUNDLE BLOCK, STENOSIS, COMPLICATIONS, CORONARY ARTERY DISEASE
This was a descriptive cross-sectional study conducted at a tertiary hospital of Manmohan cardiothoracic vascular and transplant centre (MCVTC) with a primary percutaneous coronary intervention (PCI) facility.The patients with ages greater than 18 years old and NSTEMI who underwent coronary angiography from 22 June 2020 to 21 June 2021 were included in the study. The Institutional Review Committee [Reference number: 4271 (6-11) E2 076/077)] of the institute of medicine approved the study. The sample size was calculated usingHowever, after clearing the data only 126 met the inclusion criteria.Where,n = minimum required sample sizeZ = 1.96 at 95% of Confidence Interval (CI)p = prevalence of occluded coronary arteries in NSTEMI patients, 90%q = 1-pe = margin of error, 7%The patients with ST-elevation myocardial infarction, left bundle branch block (LBBB), and troponin I rise following PCI/coronary artery bypass graft surgery (CABG) were included from the study. Similarly, patients with NSTEMI who did not undergo coronary angiography and patients who did not give written consent were also excluded. An occluded coronary artery was defined as the presence of a lesion with 100% stenosis or thrombolysis in myocardial infarction (TIMI) flow grade 0 to 1 in one or more major coronary vessels on invasive coronary angiography. Major branch occlusion was incorporated into the major vessel territory. A non-occluded or patent coronary artery was defined as TIMI flow grade 2/3. The culprit artery of the NSTEMI was determined by the cardiologist performing the coronary angiography based on the findings of electrocardiogram (ECG) changes, angiography, and echocardiography. After ascertaining the severity of coronary artery disease, the mode of revascularization is determined and if PCI is indicated, the procedure is done, and the patient is shifted to the coronary care unit (CCU) for observation and further management. Sometimes, thrombosuction and plain old balloon angioplasty (POBA) may also be done according to requirement. In the case of complex lesions, the revascularization procedure (PCI/CABG) is decided by the heart team approach.Data were collected from patients using questionnaires, physical examination, investigation parameters (cardiac biomarkers, ECG, echocardiography), coronary angiographic, and revascularization details, and in-hospital complications. Data were compiled, edited, and checked to maintain consistency. The data were recorded in a Microsoft Excel 2014 and analyzed using IBM SPSS Statistics version 24.0. Point estimate and 95% CI were calculated.