A new chapter for perioperative assessment of function?
European Journal of Cardio-Thoracic Surgery
Rozzi et al.  present an update on the novel method of acute intraoperative assessment of right ventricular function before and after pulmonary valve replacement (PVR) late after repair of tetralogy of Fallot. By placing a virtual marker on the surface of the heart they assess cardiac kinematic parameters immediately pre- and post-PVR: displacement, perimeter, contraction velocity, cardiac fatigue and energy expenditure. Exponential correlations, albeit with low coefficients, are made with right ventricular end-diastolic volume (RVEDV) index from preoperative magnetic resonance imaging (MRI) and a cut-off value of 147 ml/m2 is found to predict immediate functional recovery. Based…