Should I send this patient with two weeks of chest pain to the emergency department now, despite a prior normal sinus rhythm electrocardiogram (ECG) performed on [date]?

Send to the Emergency Department Immediately

This patient with two weeks of chest pain requires immediate transfer to the emergency department by EMS, regardless of the prior normal ECG. A previous normal ECG does not exclude acute coronary syndrome (ACS), and delayed transfer for further diagnostic testing beyond what you can provide in the office setting can be detrimental 1.

Why the Prior Normal ECG Doesn't Rule Out ACS

The 2021 AHA/ACC/CHEST guidelines explicitly state that an initial normal ECG does not exclude ACS 1. Critical evidence shows:

• Up to 6% of patients with evolving ACS are discharged from the ED with a normal ECG 1
• A normal ECG may be associated with left circumflex or right coronary artery occlusions and posterior wall ischemia, which is often "electrically silent" 1
• Research confirms that 1-4% of adult chest pain patients with absolutely normal ECGs had a final hospital diagnosis of acute myocardial infarction 2
• Decision-making should not be based solely on a single normal or nondiagnostic ECG 1

Immediate Actions Required

1. Obtain a New ECG Now (Within 10 Minutes)

• If you cannot obtain and interpret an ECG within 10 minutes in your office setting, immediate transfer to the ED by EMS is recommended 1
• Compare the new ECG with the previous one if available 1
• Serial ECGs are essential when symptoms are persistent 1

2. Transfer by EMS, Not Private Vehicle

The guidelines strongly recommend EMS transfer because it provides:

• Acquisition of a prehospital ECG to facilitate reperfusion if ST elevation is present
• Trained personnel who can treat chest pain, arrhythmias, and implement defibrillation en route
• Shorter travel time to the ED 1

3. Do Not Delay for Additional Office Testing

Delayed transfer to the hospital for determination of cardiac troponin (cTn) or other diagnostic testing beyond the ECG in the office setting can be detrimental and should be avoided 1. Cardiac troponin is the most sensitive test for diagnosing acute myocardial injury and must be measured in conjunction with clinical data 1.

Critical Pitfalls to Avoid

• Never rely on symptom duration alone: Two weeks of chest pain does not exclude acute presentation of ACS
• Never assume a prior normal ECG provides ongoing protection: Cardiac conditions evolve, and new ischemia can develop at any time
• Never delay transfer to obtain troponin in the office: This is explicitly contraindicated by guidelines 1
• Overreliance on a normal ECG in a patient with anginal chest pain is dangerous 2

The Bottom Line

The presence of chest pain for two weeks actually increases concern rather than decreases it—this represents persistent symptoms requiring urgent evaluation. The patient needs:

1. Immediate new ECG (if interpretable within 10 minutes)
2. Cardiac troponin measurement (must be done in ED, not delayed)
3. Serial ECG monitoring if initial ECG is nondiagnostic 1
4. Risk stratification using validated tools once in the ED 3

Transfer this patient to the ED by EMS now. The prior normal ECG provides no reassurance in the context of ongoing or recurrent chest pain.