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Published on: February 11, 2022
INDICATIONS FOR TREATMENT OF COMPLETE ATRIOVENTRICULAR DISSOCIATION
Insights
Patients with complete atrioventricular dissociation benefit from pacemakers. Different patient groups require tailored pacemaker strategies for optimal treatment and improved cardiac function.
Area of Science:
- Cardiology
- Medical Devices
Background:
- Complete atrioventricular dissociation presents unique treatment challenges.
- Categorizing patients is crucial for effective management.
Purpose of the Study:
- To classify patients with complete atrioventricular dissociation into distinct groups.
- To outline appropriate pacemaker implantation and management strategies for each group.
- To evaluate the functional improvement in patients after pacemaker insertion.
Main Methods:
- Classification of patients into three groups based on heart block and associated conditions.
- Description of pacemaker implantation techniques and settings for each group.
- Utilized a portable pacemaker impulse detector to diagnose pacemaker failures.
Main Results:
- Group I patients (established third-degree block) generally tolerate pacemaker implantation well.
- Group II patients (periodic third-degree block) require careful monitoring and temporary pacing during block episodes.
- Group III patients (established block with cardiac failure) often need higher pacemaker rates.
- Fifteen out of 20 patients experienced significant functional improvement post-pacemaker insertion.
- The developed impulse detector aided in identifying pacemaker failures.
Conclusions:
- Tailored pacemaker strategies based on patient group significantly improve outcomes in complete atrioventricular dissociation.
- Pacemaker therapy is effective in enhancing functional capacity for many patients.
- Advanced diagnostic tools are essential for managing pacemaker complications.
Abstract:
FOR PURPOSES OF CORRECT TREATMENT IT IS IMPORTANT TO RECOGNIZE THAT PATIENTS WITH COMPLETE ATRIOVENTRICULAR DISSOCIATION FALL INTO THREE GROUPS: Group I-established third-degree heart block with and without Stokes-Adams attacks; Group II-periodic third-degree heart block with and without Stokes-Adams attacks; Group III-established third-degree heart block with cardiac failure. Most patients in Group I present no technical problems when a pacemaker is implanted. In Group II it is advisable to insert a temporary intracardiac catheter electrode and maintain a rate of 60 to 64 during the periods of third-degree heart block. Sudden reversion, in this group, from sinus rhythm can be fatal. Group III patients will often require a pacemaker set in excess of 74 beats until they are free of cardiac failure. Fifteen of 20 patients with complete atrioventricular dissociation showed marked functional improvement after insertion of a pacemaker. The development, in our laboratory, of a 4'' portable pacemaker impulse detector has been invaluable in locating the cause of failure in an implanted pacemaker.
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