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

<bold>Introduction: </bold>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).<bold>Methods: </bold>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.<bold>Results: </bold>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%.<bold>Conclusion: </bold>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. [ABSTRACT FROM AUTHOR]