Baseline Platelet Count Predicts Infarct Size and Mortality after Acute Myocardial Infarction.

Introduction:  Platelets greatly contribute to cardiovascular diseases. We sought to explore the association of platelet counts with infarct size and outcome in patients presenting with acute ST-segment elevation MI (STEMI) treated with primary percutaneous coronary intervention (PPCI).

Methods And Results:  In this retrospective study, we grouped 1,198 STEMI patients into tertiles (T) based on platelet count on admission: T1 = 102-206 [10 platelets/L] ( = 402), T2 = 207-259 [10 platelets/L] ( = 396), and T3 = 260-921 [10 platelets/L] ( = 400).

Association of In-Hospital Hemoglobin Drop With Decreased Myocardial Salvage and Increased Long-Term Mortality in Patients With Acute ST-Segment-Elevation Myocardial Infarction.

Background Anemia and blood loss occur often in patients with ST-segment-elevation myocardial infarction (STEMI). In-hospital hemoglobin drop is associated with 1-year mortality in patients with acute coronary syndrome. However, data on the effect of hemoglobin reduction on myocardial salvage and long-term outcomes are scarce.