A leadless pacemaker is a small self-contained cylinder that is deployed and affixed directly to the right ventricular endocardium via an endovascular approach. The cylinder contains the electronics, battery, and electrodes without the need for leads or a pocket, potentially eliminating the complications associated with both pockets and leads. The technology is still somewhat new, but in the recent LEADLESS case series published in Circulation, it appears to be both safe and effective. One important limitation is that the device can only be used for right ventricular pacing without atrial sensing or pacing.
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