Sudden Cardiac Arrest During the Immediate Revascularization Period in Patients With Non-ST Elevation Myocardial Infarction: A Case Series.

Introduction: The timing of sudden cardiac arrest (SCA) after myocardial infarction (MI) has been a subject of research because of the impact on preventive strategies. Currently, there is limited data on the risk of SCA in the immediate post revascularization period (≤48 h) in non-ST segment elevation myocardial infarction (NSTEMI).
Methods: We retrospectively reviewed the electronic medical record system and identified patients who underwent revascularization for NSTEMI at Grady Memorial Hospital, Atlanta, Georgia between January 1st, 2014-December 31st, 2019. We selected patients who had SCA within 48 h of revascularization and evaluated their socio-demographic and inpatient characteristics and outcomes.
Results: Sixteen (16) cases of SCA in the immediate post revascularization period (within 48 h) were identified and analyzed which corresponds to an incidence rate of 1.8% (n = 16/869). The mean age (SD) was 69 years (14.6) and 75% were males. On angiography, more than 80% of the patients had hemodynamically significant lesions in the left anterior descending arteries and its territories and 50% had multivessel disease. All 16 patients had at least one coronary artery with hemodynamically significant lesion and successfully underwent revascularization. Three-quarter of the patients had a shockable rhythm. The etiology of SCA was in-stent thrombosis in 25% of the patients, cardiogenic shock in 19%, acute respiratory failure in 13% and unknown in 44% of the cases. The 30-day mortality rate was 38%.
Conclusion: The rate of SCA is high in the first 48 h after MI even with revascularization. Risk stratification for SCA during this critical period may improve outcomes.
Competing Interests: Declaration of competing interest The authors of this manuscript have no financial disclosure or conflict of interests to report. All authors contributed to the writing of the manuscript.
(Copyright © 2021. Published by Elsevier Inc.)