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Left Heart Branch Block
An_246536 posted:
A routine EKG suggests LBBB. What additional tests could be done to confirm the condition and indicate the severity of the problem?
cardiostarusa1 responded:

Non-invasive diagnostics, such as a nuclear stress test (gated-SPECT scan with Cardiolite or Myoview), echocardiogram (cardiac ultrasound), Cardiac CT, Cardiac MRI.

Noteworthy, a left bundle branch block (LBBB), is a commonly seen electrical conduction abnormality during a routine resting electrocardiogram (ECG/EKG), that is often associated with coronary artery disease (CAD), though it can occur in some otherwise heart-healthy individuals.

General info

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Bundle branch block

(Pertinent snippets)

Causes, significance and treatment

Bundle branch block (BBB) is a relatively frequent finding on the electrocardiogram.

Sometimes BBB itself needs to be treated; sometimes it indicates significant underlying cardiac disease that needs to be treated; and sometimes it has so little significance that no treatment is necessary at all....

Texas Heart Institute

Bundle Branch Block


If there is nothing else wrong with your heart, you probably will not feel any symptoms of bundle branch block. In fact....


In most cases, bundle branch block does not need treatment. But patients who have....

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James Beckerman, MD, FACC responded:
An ECG can identify a LBBB, but other testing is sometimes performed to look for underlying structural heart disease, based on the specific situation. An echocardiogram (ultrasound of the heart) can provide lots of information in this type of situation and can sometimes guide future testing.

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FDAYou are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

For more information, visit the Duke Health General and Consultative Heart Care Center