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Complete atrioventricular block induced during left heart catheterization.

M Kuroki¹, U Ikeda, T Noda

¹Department of Cardiology, Jichi Medical School, Tochigi, Japan.

Japanese Heart Journal

|July 1, 1991

Summary

Complete atrioventricular block (CAVB) is a rare cardiac catheterization complication. This case highlights CAVB development in a patient with pre-existing right bundle branch block due to mechanical His bundle injury during catheter passage.

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Area of Science:

Cardiology
Electrophysiology
Medical Complications

Background:

Complete atrioventricular block (CAVB) is an infrequent complication during cardiac catheterization procedures.
Patients with pre-existing conduction abnormalities, such as right bundle branch block, may be at increased risk.

Observation:

A patient with pre-existing complete right bundle branch block developed CAVB during a left-sided cardiac catheterization.
The CAVB was triggered by the passage of a left-sided catheter through the aortic valve.

Findings:

Mechanical compression of the His bundle by the cardiac catheter is the suspected cause of CAVB.
This case underscores a specific mechanism for iatrogenic heart block during invasive cardiac procedures.

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Implications:

Physicians must remain vigilant for potential CAVB development during cardiac catheterization, especially in high-risk patients.
Awareness of this complication can guide preventative strategies and prompt management during catheter-based interventions.