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[Misplaced implantation of a pacemaker electrode in a coronary vein]
Insights
Accidental pacemaker electrode placement in a coronary vein is often found via X-ray. Diagnosis involves specific X-ray views and ECG findings, but long-term function without complications is possible.
Area of Science:
- Cardiology
- Medical Imaging
- Electrophysiology
Context:
- Pacemaker implantation is a common procedure for managing cardiac arrhythmias.
- Incorrect electrode placement, particularly into a coronary vein, can occur during implantation.
- Diagnosis of malpositioned electrodes is often incidental during routine imaging.
Purpose:
- To describe diagnostic criteria for identifying pacemaker electrodes inadvertently placed in a coronary vein.
- To present a case of successful long-term pacemaker stimulation via a coronary vein without complications.
- To evaluate the necessity of repositioning electrodes in cases of coronary sinus placement.
Summary:
- Misplaced pacemaker electrodes in coronary veins are typically identified through bi-plane thoracic X-rays.
- Diagnostic indicators include electrode tip position relative to the spine and new-onset right bundle branch block on ECG.
- Pacemaker-induced diaphragmatic contractions and elevated stimulation thresholds can also suggest malposition.
- A case study details 15 months of uncomplicated pacemaker function with a coronary vein electrode, deeming repositioning unnecessary.
Impact:
- Highlights key diagnostic signs for coronary vein pacemaker electrode malposition.
- Demonstrates that coronary sinus lead placement may not always necessitate immediate correction if the pacemaker functions normally.
- Informs clinical practice regarding the management of incidentally discovered coronary vein pacemaker electrodes.
Abstract:
The wrong implantation of pacemaker electrodes into a coronary vein is in most cases accidentally diagnosed when thoracic X-ray pictures are made in two planes. It is to be excluded not with certainly in the sagittal ray-path of the thoracic X-ray picture and in the ECG of the extremities. The diagnostic criteria for the recognition of a false position are the end of the electrode which is in the frontal ray-path directed dorsally to the spine and a right bundle branch block in the ECG existing since implantation. Pacemaker-synchronous contractions of the diaphragm as well as an increased already at the time of implantation stimulus threshold may be references. Description of an own observation with an up to now long-term stimulation through a coronary vein without complications lasting 15 months, in which a correction of the position is not regarded as necessary due to the regular function of the pacemaker.