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Rate-dependent left bundle branch block during anaesthesia.

A Tyagi1, A K Sethi, V Agarwal

  • 1Department of Anaesthesiology and Critical Care, University College of Medical Sciences and GTB Hospital, Shahadra, Delhi, India.

Anaesthesia and Intensive Care
|November 13, 2004
PubMed
Summary
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Rate-dependent left bundle branch block is a rare complication during anesthesia. Carotid sinus massage successfully reverted the condition to normal sinus rhythm in a patient without prior heart disease.

Area of Science:

  • Cardiology
  • Anesthesiology

Background:

  • Rate-dependent left bundle branch block (LBBB) is uncommon during general anesthesia.
  • LBBB complicates electrocardiographic diagnosis of acute myocardial infarction (AMI) and can mimic ventricular tachycardia.

Observation:

  • A case of new-onset, rate-dependent LBBB occurred in a patient undergoing general anesthesia.
  • The patient had no prior history of ischemic heart disease.

Findings:

  • Carotid sinus massage was performed, leading to a decrease in heart rate.
  • The intervention successfully reverted the LBBB to a normal sinus rhythm.

Implications:

  • This case highlights a rare anesthetic complication and its management.
  • Prompt recognition and intervention, such as carotid sinus massage, can resolve rate-dependent LBBB during anesthesia.

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