Heart 1998;79:217-218 ( March )
Editorial
Dual chamber single lead pacing
| The first 150 words of the full text of this article appear below. |
The idea of single lead atrial synchronous ventricular pacing dates back to the early 1960s when the atrial triggered ventricular paced (VAT) mode was introduced.1 Its clinical use was only limited by the fact that an additional atrial lead had to be inserted, a rather difficult procedure with the available technology. However, after the development of specific atrial leads, dual chamber pacing (DDD) also became available and its clinical success made the concept of single lead AV synchronous pacing (VAT, VDD) obsolete.
It took another decade to learn that placement of atrial leads remained
difficult, before Antonioli and coworkers re-introduced the concept of
a single AV lead in the late 1970s. They observed that atrial
depolarisation could reliably be detected through the blood stream by
far-field sensing from a unipolar electrode floating in the mid-right
atrium.2 The most important fact was that no direct wall
contact was needed for sensing,
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