Abstract 18298: 10-Year Trends of In-Hospital Outcomes of Patients That Underwent Percutaneous Coronary Intervention for Cardiogenic Shock Complicating Acute Coronary Syndrome

Abstract

Background: Cardiogenic shock complicating acute coronary syndrome (CS-ACS) is a life-threatening condition and percutaneous coronary intervention (PCI) remains a fundamental approach in its management. In recent years, notable advancements have emerged, including the utilization of mechanical circulatory support (MCS) devices and an enhanced understanding of patient selection for PCI. This study aims to assess the temporal trends in patient background and outcomes of patients who underwent PCI for CS-ACS. Methods: The Keio interhospital Cardiovascular Studies (KiCS)-PCI registry prospectively collects approximately 200 variables, which were defined in accordance with the National Cardiovascular Data Registry (NCDR), from the major teaching hospitals in Tokyo metropolitan area in Japan. Between 2009 and 2019, 24,671 consecutive cases were registered, 10,053 patients (40.7%) undergoing PCI for ACS, of which 870 patients (8.5%) had CS-ACS. We stratified CS-ACS patients into 4-time frame groups (T1: 2009-2011, T2: 2012-2013, T3: 2014-2016, and T4: 2017-2019), and examined the temporal trends in patient risk profiles using the NCDR score (ranging 0-100, reflecting predicted mortality rates). Additionally, we assessed the incidence and types of employed MCS as well as the in-hospital mortality rate. Results: During the study period, the proportion of CS-ACS remained stable, accounting for 8.0% in T1 to 8.2% in T4 of ACS-related PCI cases. The calculated NCDR risk score demonstrated minimal variation, ranging from 70.6 in T1 to 70.1 in T4. There was a notable decrease in the utilization of MCS (66.5% in T1 to 56.7% in T4), mainly driven by a reduction in the use of intra-aortic balloon pump (70.3% to 55.0%, p for trend<0.001), with a increase in the concomitant use of veno-arterial-extracorporeal membrane oxygenation (27.6% to 36.2%, p for trend<0.001). However, the in-hospital mortality rate for CS-ACS patients remained persistently high at 30%. Conclusion: Over the past decade, there have been notable changes in the peri-procedural management of CS-ACS, albeit no significant improvements in patient outcomes was observed. The result calls for additional efforts to enhance their management.