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[Severe postoperative heart blocks appearing late. 16 cases].
Archives Des Maladies Du Coeur Et Des Vaisseaux
|October 1, 1983
Summary
Congenital heart disease surgery can lead to late-onset heart block, requiring pacemaker implantation. Early detection and intervention are crucial for managing these serious conduction defects.
Area of Science:
- Cardiology
- Cardiac Surgery
- Electrophysiology
Context:
- Congenital heart disease (CHD) surgery patients face risks of delayed cardiac conduction abnormalities.
- Late-onset heart block, including complete atrioventricular and sinoatrial block, can manifest months or years post-surgery.
- This study examines 16 patients experiencing these late complications.
Purpose:
- To analyze the incidence, progression, and management of late-onset heart block after CHD surgery.
- To identify risk factors and patterns of conduction defects.
- To emphasize the importance of timely pacemaker implantation.
Summary:
- Sixteen patients (4-42 years) developed complete atrioventricular or sinoatrial block 9 months to 19 years post-CHD surgery.
- Progression patterns included alternating sinus rhythm/conduction defects, sudden severe block, or PR interval lengthening.
- Symptoms like syncope and dizziness were common, necessitating permanent pacing in all cases.
Impact:
- Late conduction defects occur in 1-2% of operated patients, potentially caused by fibrosis of congenitally fragile pathways.
- These blocks can be advanced and linked to sudden cardiac death.
- Judicious pacemaker implantation is recommended to prevent severe outcomes.