Thrombus formation in non-ST Elevation Acute Coronary Syndrome (NSTE-ACS) causes increased plateletconsumption, leading to a 20-fold increase of Reticulated Platelets (RP) release. Reticulated platelets have more granulesand proteins that make them quickly forming thrombus than mature platelets, potent to form bigger thrombus, andincrease the risk of Major Adverse Cardiac Events (MACE). HEART score is a risk stratification for possible NSTE-ACS, whichcan predict MACE. The study aimed to analyze the correlation between the percentage of reticulated platelets and HEARTscore. This research was a correlation observational cross-sectional study performed in Dr. Hasan Sadikin Hospital,Bandung, from August 2018 to May 2019. The subjects were patients suspected with NSTE-ACS by clinicians in theEmergency Department of Dr. Hasan Sadikin Hospital. These subjects were assessed for the HEART score andRP percentage. This study involved 52 subjects consisting of a higher number of males (76.9%) aged 45-64 years old (69.2%).HEART score stratification in this study was mostly high risk (69.2%), but none was low risk. Mean of platelet count, absolute3 3 RP, and RP percentage were 271±73 x103/mm , 9.3±4.3 x 103/mm , and 3.6±1.7%, respectively. The correlation testbetween RP percentage and HEART score with a 95% confidence interval using Spearman's correlation test showed asignificant positive correlation with moderate strength (p < 0.001 and r=0.475). The percentage of RP in this study was in thenormal range. However, there was a significant positive correlation with moderate strength between the percentage of RPand HEART scores in patients with suspected non-ST elevation acute coronary syndrome.
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