Morphological and dynamic analysis of the normal aortic valve with 4D computed tomography.

Objectives: To evaluate the precise dimensions of the normal aortic root, especially the true aortic annulus, during the cardiac cycle using an innovative reconstruction method based on multiphase cardiac computed tomography and to assess the feasibility and the reproducibility of this method for aortic root analysis.

Methods: Between January 2019 and June 2021, 30 optimal consecutive ECG-gated multiphase cardiac computed tomography of patients with normal tricuspid aortic valve were analysed using an in-house software. Aortic annulus border was pinpointed on 9 reconstructed planes and the 3D coordinates of the 18 consecutive points were interpolated into a 3D curve using a cubic spline.

The mortality rates in registries of patients with STEMI are highly affected by inclusion criteria and population characteristics.

Background: Different mortality rates are reported in registries of patients with ST-segment elevation myocardial infarction (STEMI), but comparisons between registries are challenging.

Aims: To determine whether the higher mortality rate in our regional French registry (SCALIM) is related to different inclusion criteria and demographic characteristics.

Methods: The SCALIM registry included all patients with STEMI within the first 24 h in the region of Limousin, France (06/2011-01/2015).