Acute chest pain investigation: Utility of cardiac CT angiography in guiding troponin measurement

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To assess the impact on length of stay and rate of major adverse cardiovascular events of a cardiac computed tomographic (CT) angiography-guided algorithm to examine patients who present to the emergency department (ED) with low- to intermediate-risk chest pain. MATERIALS AND METHODS: The study was approved by the institutional review board, and all patients gave written informed consent. Two hundred three consecutive patients (mean age, 55 years +/- 11 [standard deviation]; 123 men) with low- to intermediate-risk ischemic-type chest pain were prospectively enrolled. Patients underwent initial cardiac CT angiography with subsequent treatment determined by reference to findings at cardiac CT angiography; patients without overt plaque were immediately discharged from the hospital, patients with nonobstructive plaque and mild-to-moderate stenoses were discharged after a negative 6-hour troponin level, and patients with severe stenoses were admitted to the hospital. Discharged patients were followed up for a mean of 14.2 months. Additionally, length of stay and safety outcomes among these patients were compared with those in 102 consecutive patients with low- to intermediate-risk chest pain who presented to the ED and underwent a standard of care (SOC) work-up without cardiac CT angiography. One-way analysis of variance with Bonferroni correction was used to compare length of stay between groups. RESULTS: Cardiac CT angiography findings in the 203 patients who underwent cardiac CT angiography were as follows: Sixty-five (32 ) patients had no plaque, 107 (53 ) had nonobstructive plaque, and 31 (15 ) had severe stenoses. At follow-up, there were no deaths or cases of acute coronary syndrome (cardiac CT angiography, 0 , 95 confidence interval [CI]: 0 , 1.85 ; SOC, 0 , 95 CI: 0 , 3.63 ), and the rate of readmission to the hospital because of chest pain was higher with the SOC approach (9 vs 1 , P = .01). Mean ED length of stay was lower with cardiac CT angiograp
Original languageEnglish
Pages (from-to)381 - 389
Number of pages9
Issue number2
Publication statusPublished - 2011

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