CTICasesLeadless Pacemaker Deployment and Pull Test
Imaging findings
Images depict a leadless pacemaker device featuring tines, positioned within the ventricular cavity and affixed to the ventricular wall. In the pre-deployment phase, the tines are observed to be straight and housed within a sleeve. Following deployment, they adopt a curved configuration. A "pull and hold test" is performed to verify proper engagement, during which the tines temporarily stretch when pulled and then revert to their original position upon release.
Key takeaways
Leadless pacemakers are designed for deployment directly onto the ventricular wall using tines. Proper engagement and secure fixation are crucial, often confirmed by a "pull and hold test" that assesses the tines' configuration and stability under gentle tension. Understanding the appearance and functional principles of this device is important for image interpretation.
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