The Micra TPS (Transcatheter Pacing System) is a tiny pacemaker -- no bigger than a vitamin capsule -- that can be implanted using a catheter. There have been some remarkably small pacemakers developed in recent years, but none quite this small.
Pacemakers are usually surgically implanted in a pocket under the chest skin, causing a visual protrusion. Connected to the heart electrically, these devices can cause complications if the leads get detached. However the self-contained Micra TPS has no electrical leads and is instead attached directly to the heart wall, delivering electrical stimulation via an electrode.
Not only does this tiny pacemaker offer more reliable functionality, but it's also less intrusive, thereby allowing heart patients to enjoy more regular lives without attracting attention for an unsightly bulge on the left side of their chests.
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