Cardiac Arrest: Diagnosis and Tests

Introduction

Cardiac arrest is a life-threatening condition in which the heart suddenly stops beating. This results in a complete loss of blood circulation in the body. Quick diagnosis and immediate treatment are crucial for survival.

Symptoms and Warning Signs

Cardiac arrest usually occurs suddenly but may be preceded by: - Sudden loss of consciousness - No pulse or breathing - Chest pain or discomfort - Shortness of breath - Dizziness or fainting

Diagnostic Tests for Cardiac Arrest

1. Electrocardiogram (ECG)

  • Detects abnormal heart rhythms (arrhythmias) that may have caused the cardiac arrest.

2. Blood Tests

  • Troponin Test: Determines damage to heart muscle.
  • Electrolyte Levels: Checks for imbalances (e.g., potassium, calcium, and magnesium) that may trigger arrhythmias.
  • Acid-Base Balance & Oxygen Levels: Determines if metabolic abnormalities contributed to cardiac arrest.

3. Echocardiography (Heart Ultrasound)

  • Evaluates heart structure and function to assess potential causes like heart failure or valve disease.

4. Coronary Angiography

  • Performed if a heart attack (myocardial infarction) is suspected as the cause.
  • Identifies blockages in coronary arteries.

5. CT or MRI Brain Scan

  • Used in post-resuscitation care to evaluate potential brain damage due to oxygen deprivation.

Importance of Immediate Action

If you suspect someone is in cardiac arrest: 1. Call emergency medical services immediately. 2. Begin CPR (Cardiopulmonary Resuscitation). 3. Use an AED (Automated External Defibrillator) if available. 4. Continue CPR until medical help arrives or the person regains consciousness.

Conclusion

Understanding diagnostic tests for cardiac arrest helps improve emergency response and survival chances. Preventive measures like healthy lifestyle choices and regular screenings significantly reduce risk.

Source recommendations

1. American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care

  1. https://professional.heart.org/en/science-news/2020-aha-guidelines-for-cpr-and-ecc
  2. https://cpr.heart.org/en/resuscitation-science/cpr-and-ecc-guidelines
  3. https://www.ahajournals.org/doi/10.1161/CIR.0000000000001194
  4. https://pubmed.ncbi.nlm.nih.gov/33081530/
  5. https://www.ahajournals.org/doi/10.1161/CIR.0000000000000918

2. European Resuscitation Council Guidelines for Resuscitation

  1. https://cprguidelines.eu/guidelines-2021
  2. https://www.sciencedirect.com/science/article/pii/S0300957221000551
  3. https://cprguidelines.eu/
  4. https://www.erc.edu/
  5. https://pubmed.ncbi.nlm.nih.gov/33773825/

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