Management of Acute Coronary Syndrome with Chest Pain Radiating to the Right Arm

Clinical Presentation and Initial Assessment

Typical ACS pain is described as pressure, oppression, or heaviness that is retrosternal and may radiate to the left arm, right arm, both arms, neck, jaw, or back, according to the American College of Cardiology 1
The presence of diaphoresis combined with typical pain patterns, including right arm radiation, has 95% specificity and a likelihood ratio of 5.18 for ACS, as recommended by the American College of Cardiology 1

Patients with chest pain radiating to the right arm should call 9-1-1 immediately and transport by ambulance rather than private vehicle, as advised by the American Heart Association 2, 3
EMS providers should administer 162-325 mg aspirin, unless contraindicated or already taken, as recommended by the American Heart Association 2, 3
Administer 1 dose of sublingual nitroglycerin if previously prescribed, unless systolic BP <90 mmHg, as advised by the American Heart Association 2, 3

Obtain 12-lead ECG within 10 minutes of presentation to distinguish STEMI from non-ST-elevation ACS, as recommended by the European Society of Cardiology 4, 1
Draw cardiac troponin immediately, with repeat measurement at appropriate intervals per protocol, as advised by the European Society of Cardiology 4, 1
Patients with chest pain radiating to the right arm require immediate triage nurse assessment for ACS protocol initiation, according to the American College of Cardiology 5, 6

Patients with right arm radiation plus any high-risk features, such as chest discomfort at rest for >20 minutes, hemodynamic instability, recent syncope or presyncope, severe dyspnea, or palpitations, require immediate ED transport, as recommended by the American Heart Association 7, 8
Right arm radiation in patients who are male, age >70 years, or diabetic increases ACS likelihood, according to the American Heart Association 7

STEMI is diagnosed by persistent ST-segment elevation >1 mm in contiguous leads or new left bundle branch block, as defined by the European Society of Cardiology 4, 1, 7
Elevated troponin I, troponin T (>99th percentile upper reference limit) with rising or falling pattern confirms myocardial infarction, as recommended by the European Society of Cardiology 4
Troponin measurement at 0 and 1-2 hours using ESC algorithms for rapid rule-in/rule-out, as advised by the European Society of Cardiology 4

Do not dismiss right arm radiation as atypical—it carries nearly 3-fold increased likelihood of ACS and warrants full evaluation, as recommended by the American Heart Association 2
Do not evaluate patients with suspected ACS solely over the telephone—they require facility-based evaluation with ECG and biomarkers, as advised by the American Heart Association 2
Do not delay ECG beyond 10 minutes of presentation, as recommended by the European Society of Cardiology 4, 1