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Intra-hisian block associated with unusual etiologies
1Cardiac Pacing and Electrophysiology Laboratory, Fu Wai Hospital, Chinese Academy of Medical Sciences, Beijing.
Pacing and Clinical Electrophysiology : PACE
|September 1, 1987
Summary
Unusual causes of intra-Hisian block, a type of atrioventricular block, were identified in 4 patients. These rare etiologies included rheumatoid arthritis, cysticercosis, Behcet's disease, and Takayasu arteritis.
Area of Science:
- Cardiology
- Electrophysiology
- Internal Medicine
Background:
- Atrioventricular block (AV block) is a common cardiac condition requiring electrophysiologic study.
- Intra-Hisian block represents a specific subtype of AV block within the His-Purkinje system.
Observation:
- Electrophysiologic study was performed on 169 patients with atrioventricular block.
- Intra-Hisian block was diagnosed in 45 (27%) of these patients.
- Four cases presented with uncommon etiologies for intra-Hisian block.
Findings:
- Detailed clinical and electrophysiologic features of 4 patients with unusual intra-Hisian block etiologies are presented.
- The identified rare causes include rheumatoid arthritis, cysticercosis cellulosae, Behcet's disease, and Takayasu aorto-arteritis.
- These findings highlight the diverse pathological processes that can affect the His-Purkinje system.
Implications:
- Recognizing these unusual etiologies is crucial for accurate diagnosis and management of intra-Hisian block.
- This study expands the understanding of the differential diagnosis for intra-Hisian block.
- Further research into the specific mechanisms linking these systemic diseases to cardiac conduction abnormalities is warranted.