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Myocardial infarction masked by high level spinal anesthesia in a patient undergoing herniorrhaphy

Hsu-Chu Chang1, Yuan-Ji Day, Chia-Hung Chang

  • 1Department of Anesthesiology, Chang Gung Memorial Hospital, Guei Shan Shiang, Taoyuan, Taiwan, ROC.

Acta Anaesthesiologica Taiwanica : Official Journal of the Taiwan Society of Anesthesiologists
|January 20, 2007
PubMed

Insights

Regional anesthesia may mask myocardial infarction symptoms during surgery. High spinal blocks can obscure pain, delaying diagnosis and treatment of perioperative heart attacks.

Area of Science:

  • Anesthesiology
  • Cardiology
  • Critical Care Medicine

Background:

  • Myocardial infarction (MI) is a significant cause of perioperative morbidity.
  • Regional anesthesia is often preferred for lower abdominal/extremity surgeries in cardiac patients, despite limited evidence for MI reduction.
  • High sensory block levels in spinal anesthesia can potentially mask MI symptoms.

Observation:

  • A case of perioperative myocardial infarction (MI) is presented.
  • The patient's MI symptoms were masked by a high sensory block (T4 level) from spinal anesthesia.
  • The diagnosis was delayed until the patient recovered in the post-anesthesia care unit (PACU).

Findings:

  • High spinal anesthesia can obscure referred pain from myocardial infarction.
  • This masking effect may lead to delayed diagnosis and treatment of perioperative MI.
  • Perioperative MI can occur intraoperatively or postoperatively and present insidiously.

Implications:

  • Anesthesiologists should consider the potential for masked MI symptoms in patients with high spinal blocks.
  • Vigilance for non-classical MI presentations is crucial in the perioperative period.
  • Further research is needed to clarify the relationship between regional anesthesia and perioperative MI detection.

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