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[Stress-induced bundle-branch block].

H Borer¹, B Martina

¹Medizinische Universitäts-Poliklinik, Departement Innere Medizin, Kantonsspital Basel.

Schweizerische Medizinische Wochenschrift

|December 26, 1992

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Exercise-induced bundle branch block (BBB), particularly right BBB, signals a high risk for underlying coronary heart disease. Noninvasive methods may miss this critical link, necessitating further cardiac investigation.

Area of Science:

Cardiology
Electrophysiology
Diagnostic Imaging

Background:

Bundle branch block (BBB) can be a sign of underlying heart conditions.
Exercise stress testing is a common noninvasive method for diagnosing coronary artery disease.

Observation:

Two patients presented with exercise-induced bundle branch block (BBB).
Coronary heart disease was not diagnosed by standard noninvasive techniques in these patients.

Findings:

Exercise-induced BBB, especially right BBB, is strongly associated with coronary heart disease.
The presence of exercise-induced BBB warrants an intensive search for coronary heart disease.

Implications:

Clinicians should consider coronary heart disease in patients with exercise-induced BBB, even with negative noninvasive tests.

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Further investigation may be needed to confirm coronary heart disease in these cases.

This association highlights the importance of recognizing exercise-induced BBB as a potential cardiac risk indicator.