Abstract
The orthotopic transplanted heart (OHTX) patient may have two sinus nodes, an innervated recipient and a denervated donor, the later being characterized physiologically by autonomic denervation and chronotropic incompetence. Several studies report a high incidence of sinus node dysfunction (SND) following OHTX some requiring pacemakers. Multiple pacemaker techniques are used, with placement of leads in the donor right atrium (AD), donor right ventricle (VD) and recipient right atrial remnant (AR).
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