Stephen J. Schueler, M.D.

Overview Symptoms Evaluation EP studies Treatment pacemaker specialist Home Care diet pulse checks taking control warning signs Underlying Cause complete block left anterior hemiblock left posterior hemiblock Types Anatomy

LBBB Evaluation

The evaluation of a left bundle branch block starts with a history and physical examination.

The physical exam is usually normal in someone with left bundle branch block.

The diagnosis of left bundle branch block is made on an electrocardiogram (EKG) or heart monitor.

Tests that may be used to evaluate left bundle branch block may include:

Additional tests that may be used to evaluate left bundle branch block include:

LBBB EP Studies

Electrophysiologic, or EP, studies of the heart may be performed on those with left bundle branch block during cardiac catheterization. This procedure uses tiny sensors to measure electrical impulses in the heart.

Continue to LBBB Treatment

Last Updated: Dec 17, 2010 References
Authors: Stephen J. Schueler, MD; John H. Beckett, MD; D. Scott Gettings, MD
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PubMed LBBB References
  1. Guerrero M, Harjai K, Stone GW, Brodie B, Cox D, Boura J, Grines L, O'Neill W, Grines C. Comparison of the prognostic effect of left versus right versus no bundle branch block on presenting electrocardiogram in acute myocardial infarction patients treated with primary angioplasty in the primary angioplasty in myocardial infarction trials. Am J Cardiol. 2005 Aug 15;96(4):482-8. [16098297]
  2. Lee SJ, McCulloch C, Mangat I, Foster E, De Marco T, Saxon LA. Isolated bundle branch block and left ventricular dysfunction. J Card Fail. 2003 Apr;9(2):87-92. [12751128]
  3. Nguyen K, Cigarroa JE, Lange RA, Hillis LD, Keeley EC. Presence and extent of angiographic coronary narrowing in patients with left bundle branch block. Am J Cardiol. 2004 Jun 1;93(11):1426-7, A10. [15165932]
  4. Reuben AD, Mann CJ. Simplifying thrombolysis decisions in patients with left bundle branch block. Emerg Med J. 2005 Sep;22(9):617-20. [16113178]
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