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Comparison of Invasive and Non-Invasive Treatment Strategies in Older Patients With Acute Myocardial Infarction Complicated by Cardiogenic Shock (from the Polish Registry of Acute Coronary Syndromes - PL-ACS)

      Cardiogenic shock (CS) continues to be the most important factor affecting the mortality rate of patients with acute myocardial infarctions (AMIs). However, controversy regarding the optimal treatment of older patients with AMIs complicated by CS still exists. The aim of this study was to compare the results of invasive (coronary angiography during index hospitalization) and noninvasive treatment strategies in patients aged ≥75 years with AMIs complicated by CS, defined as systolic blood pressure <90 mm Hg or need for hemodynamic support and end-organ hypoperfusion. A multicenter Polish registry that included data on patients with acute coronary syndromes was examined to identify patients with AMIs treated from October 2003 to May 2007. A total of 97,531 patients with AMIs were hospitalized, and 5.5% of those patients (n = 5,390) had CS on admission, including 1,976 patients aged ≥75 years (509 treated invasively and 1,467 treated noninvasively). In-hospital mortality was 55.4% in patients treated invasively and 69.9% in patients treated noninvasively (p <0.0001). After 6 months, the mortality rate was 65.8% in the invasive group and 80.5% in the noninvasive group (p <0.0001). Propensity score analysis, in which 499 patients of each group were analyzed after being matched for demographic and clinical data, confirmed the early and long-term benefits of the invasive strategy. In conclusion, applying the invasive strategy to patients with AMIs complicated by CS reduced in-hospital and 6-month mortality in patients aged ≥75 years.
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