Outcomes in Patients With Chest Pain Discharged After Evaluation Using a High-Sensitivity Troponin T Assay.

Area of Science:

• Cardiology
• Emergency Medicine
• Clinical Diagnostics

Background:

• Unspecified chest pain is a common emergency department diagnosis.
• The prognostic impact of high-sensitivity troponin T (hsTnT) assays in this population is unclear.

Purpose of the Study:

• To evaluate if hsTnT assay implementation reduces major adverse cardiac events (MACEs) and improves cardiovascular (CV) risk profiling in chest pain patients discharged from the emergency department (ED).

Main Methods:

• A retrospective study of 65,696 patients with unspecified chest pain discharged from 16 Swedish EDs (2006-2013).
• Comparison of outcomes between patients evaluated with conventional assays versus hsTnT assays.
• Analysis of 30-day MACE and CV risk profiles using national registry data.
• Separate analysis for directly discharged patients and those admitted after initial evaluation.

Main Results:

• Directly discharged patients evaluated with hsTnT had fewer MACEs (0.6% vs. 0.9%) and a lower CV risk profile.
• Patients discharged after admission had more MACEs (7.2% vs. 3.4%) with hsTnT, indicating identification of higher-risk individuals.
• hsTnT assay implementation was associated with differential outcomes based on admission status.

Conclusions:

• hsTnT assays improve risk stratification for chest pain patients in the ED.
• Directly discharged patients benefit from hsTnT evaluation with reduced MACEs.
• The assay aids in identifying true at-risk patients, leading to better management and improved ED evaluations.