A simplified assessment of increased afterload by thoracic endovascular aortic repair

Figures

• 

  Afterload and workload drawn from simultaneous recordings of blood flow and pressure in the arch.

• 

  Video 1. Demonstration of the process of simplified analysis from the 4 simultaneous displays to measurements of each parameter. Video available at: https://www.jtcvs.org/article/S2666-2507(19)30061-6/fulltext.

• 

  Figure 1. Method of data collection and parameters. The pressure and flow velocity were recorded simultaneously via a catheter for angiography and with transesophageal echocardiography. Pairs of corresponding waveforms were traced, and each parameter was measured (see also Video 1). TEE, Transesophageal echocardiography.

• 

  Figure 2. Changes in aortic stiffness and cardiac workload following stent graft deployment. A, The parameter of aortic stiffness, ΔP/∫V dt, was significantly increased. B, The parameter of cardiac workload, peak P × peak V, was also increased significantly. The red lines indicate median values.