Strangulation: A Cause or Mimicker of Global Myocardial Hypoxia on ECG

Area of Science:

• Cardiology
• Emergency Medicine
• Physiology

Background:

• Electrocardiogram (ECG) ST segment changes are primary indicators of myocardial ischemia.
• However, non-ischemic causes can also precipitate these ECG findings, necessitating careful clinical correlation.
• Distinguishing true ischemia from mimics is crucial for appropriate patient management.

Observation:

• A 21-year-old male presented with cardiac arrest post-strangulation attempt.
• Initial ECG showed diffuse ST depressions and ST elevation in augmented vector right (aVR), suggestive of acute myocardial infarction.
• Subsequent ECGs normalized, and echocardiography revealed no cardiac wall motion abnormalities.

Findings:

• The observed ST segment changes were attributed to systemic hypoxia secondary to strangulation, not acute myocardial infarction.
• This highlights the impact of global hypoxia on cardiac electrical activity.
• The case underscores the potential for ECG findings to mimic ischemic heart disease under non-coronary circumstances.

Implications:

• Clinicians must consider systemic hypoxia in the differential diagnosis of ST segment changes, especially in non-traditional presentations.
• ECG interpretation requires integrating findings with the overall clinical context to avoid misdiagnosis of acute myocardial infarction.
• This case emphasizes the importance of a broad diagnostic approach in critical care settings involving cardiac arrest and ECG abnormalities.