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Question
Why left bundle branch block is contraindication for excercise tolorance test?
Raghunath,
An exercise stress test us usually done to look for evidence of coronary artery disease. The EKG is monitored for abnormal changes during exercise. A left bundle branch block causes the EKG to look abnormal. This makes it impossible to tell if abnormal changes occur during exercise (since the EKG was abnormal looking at rest). Therefore, a diagnostic EKG stress test is not possible when a person has a left bundle branch block.
I hope this answers your question.
Todd
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Answers by Expert:
Todd Bublitz, RCEP
Expertise
I can answer questions on Cholesterol & Lipids, Cardiac Rehabilitation, and preventive cardiology. I can also explain the risk factors for cardiovascular disease and most cardiac diagnostic tests and procedures.
Experience
Organizations
National Lipid Association
American Association of Cardiovascular and Pulmonary Rehabilitation (AACVPR)
American College of Sports Medicine (ACSM)
Preventive Cardiovascular Nurses Association (PCNA)
Rocky Mountain Cardiopulmonary Rehabilitation Association (RMCRA)
Education/Credentials
Registered Clinical Exercise Physiologist by ACSM
Certified as 'Exercise Specialist' by ACSM
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