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Related Experiment Videos

Repetitive intermittent left bundle branch block.

Miguel A Arias1, Ana M Sánchez, Juana M López

  • 1Cardiac Arrhythmia and Electrophysiology Unit, Department of Cardiology, Complejo Hospitalario De Jaén, Jaén, Spain. maapalomares@secardiologia.es

Pacing and Clinical Electrophysiology : PACE
|November 15, 2006
PubMed
Summary
This summary is machine-generated.

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This study details intermittent left bundle branch block (LBBB) in a woman without heart disease. Findings show LBBB varies with heart rate and time of day.

Area of Science:

  • Cardiology
  • Electrophysiology
  • Internal Medicine

Background:

  • Evaluation of palpitations and electrocardiogram (EKG) findings are crucial in cardiology.
  • Left bundle branch block (LBBB) can indicate underlying cardiac conditions, though sometimes presents without structural heart disease.

Observation:

  • A 32-year-old woman presented with occasional daily palpitations and a diagnosed left bundle branch block (LBBB).
  • No history of structural heart disease was noted in the patient.

Findings:

  • Continuous 24-hour Holter monitoring revealed intermittent LBBB with varying grades.
  • The LBBB exhibited a rate-dependent pattern, worsening with increased heart rate.
  • Circadian variations were observed in the occurrence and severity of the LBBB.

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Implications:

  • This case highlights the importance of comprehensive monitoring for intermittent LBBB, even in the absence of structural heart disease.
  • Understanding the rate-dependent and circadian patterns of LBBB can aid in diagnosis and management.
  • Further research may elucidate the mechanisms behind idiopathic intermittent LBBB.