A single prolate spheroidal element is defined with fibres oriented 65 degrees wrt the horizontal on the inside and -55 degrees wrt the horizontal on the outside. Sheet angles are defined as -45 degrees and +45 degrees at inner and outer nodes respectively. Geometry is interpolated isochorically (Focus^3.Cosh[lambda].Sinh^2[lambda]). Hydrostatic pressure is interpolated quadratically in Xi3 (element based) and the pole-zero law defines the incompressible material behaviour. The prolate is inflated with a pressure of 2kPa on the inside face while the the pressure is held at zero on the outside face. It is then contracted with active fibre stresses (steady state Calcium-length-tension relation). the solution starts from pressure inflated solution of 2kPa. Newton's method is used to solve the sparsely stored linear equations. Note this is based on example 545 with the maxium Ca concentration reduced to maintain stability. Coronary vessels are added in region 2.