Acute Coronary Syndrome: Presentation and Diagnostic Evaluation.

Area of Science:

• Cardiology
• Emergency Medicine
• Diagnostic Imaging

Background:

• Acute coronary syndrome (ACS) presents as myocardial infarction or ischemia due to disrupted coronary blood flow.
• Patients often report chest pain or pressure in the emergency department (ED), but atypical symptoms are also common.
• Early and accurate diagnosis of ACS is critical, as misdiagnosis occurs in 2-5% of ED patients.

Purpose of the Study:

• To outline the diagnostic evaluation of acute coronary syndrome (ACS) in the emergency department.
• To detail the role of electrocardiograms (ECGs) and troponin testing in ACS diagnosis.
• To describe risk stratification tools and further diagnostic modalities for suspected coronary artery disease (CAD).

Main Methods:

• Initial assessment includes electrocardiogram (ECG) within 10 minutes of presentation.
• Troponin levels are measured, with levels above the 99th percentile indicating ACS.
• For negative initial tests, risk stratification using TIMI or HEART scores guides further evaluation for coronary artery disease (CAD).

Main Results:

• ST-segment elevation MI (STEMI) is diagnosed based on ECG findings.
• Elevated troponin levels confirm ACS in the absence of STEMI.
• Risk scores and subsequent tests like stress testing or angiography are used to exclude coronary artery disease (CAD) in lower-risk patients.

Conclusions:

• Prompt ECG and troponin testing are essential for diagnosing ACS.
• Risk stratification tools are valuable for guiding further investigation of coronary artery disease (CAD).
• Minimizing misdiagnosis and inappropriate discharge is crucial for patient safety in ACS evaluation.