Prior minimally invasive experience and the robotic mitral valve learning curve: a focused narrative review and the...

Robotic mitral valve repair has expanded rapidly, yet its learning curve is reported inconsistently and its determinants remain poorly understood. This focused narrative review, informed by a targeted scoping search, surveys the robotic and minimally invasive cardiac learning-curve literature and finds that the estimated learning phase depends on the chosen metric: operative-time analyses commonly place the plateau within the low tens to about fifty cases, whereas risk-adjusted clinical-outcome models extend it beyond ninety. A recent two-centre study reported operative-time cumulative-sum plateaus of robotic mitral repair at 16 versus 32 cases in the centre transitioning from mini-thoracotomy minimally invasive mitral valve surgery (MT-MIMVS) versus directly from sternotomy; the faster centre, however, also began faster and differed in repair technique, case-mix and proctoring; the comparison, resting on two single-surgeon programmes, is an observed association rather than causal evidence. Within the evidence identified, none quantified prior minimally invasive experience as a moderator of the robotic curve, leaving a specific, testable gap. We propose a neurocognitive framework - the tactile-visual decoupling hypothesis - that arranges the three principal mitral approaches along a coupling spectrum, with MT-MIMVS occupying a transitional zone in which cortical visuo-tactile remapping may be partially established before the near-complete decoupling of the robotic console. Drawing on sensory-substitution, haptic-feedback and cerebellar internal-model evidence, we derive predictions across neuroimaging, dose-response and error-profile domains designed to distinguish a specific visuo-tactile mechanism from the institutional, technical and volume confounders that currently accompany the observation, and outline the study designs required to test them.