ventricular volumes ejection fraction mass wall stress regional wall motion l.
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VENTRICULAR VOLUMES EJECTION FRACTION MASS WALL STRESS REGIONAL WALL MOTION. Márcio Alves de Urzêda, M.D.; MSc. VOLUMES (Technical considerations). Cine film: 15-60 fps; Radiographic contrast: 7-15mL/s and 30-50mL. Sites: Left ventricle; Left atrium (trans-septal technique);

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ventricular volumes ejection fraction mass wall stress regional wall motion

VENTRICULAR VOLUMESEJECTION FRACTIONMASSWALL STRESSREGIONAL WALL MOTION

Márcio Alves de Urzêda, M.D.; MSc

volumes technical considerations
VOLUMES(Technical considerations)
  • Cine film:
    • 15-60 fps;
  • Radiographic contrast:
    • 7-15mL/s and 30-50mL.
  • Sites:
    • Left ventricle;
    • Left atrium (trans-septal technique);
    • Severe aortic insufficiency:
      • Aortic root.
ventricular volumes
Ventricular volumes
  • Silhouette must be traced:
    • Marged visible contrast;
    • Include trabeculations and papillary muscles.
ventricular volumes4
Ventricular volumes
  • Approximated by an ellipsoid;
  • Regression equations correct the overestimation.
  • Biplane projection to
  • determinate M and N.
ventricular volumes5
Ventricular volumes
  • Area-length method (Dodge);
  • Biplane oblique (RAO/LAO):
ventricular volumes6
Ventricular volumes
  • Single plane formula:
  • AP or RAO;
  • Left ventricular shape is a spheroid (ellipsoid wich two minor axes are equal).
ventricular volumes7
VENTRICULAR VOLUMES
  • Volume correction:
    • Overestimation by papillary muscles and trabeculaes.
  • Regression equations
ejection fraction regurgitant fraction
EJECTION FRACTIONREGURGITANT FRACTION
  • EF= (EDV-ESV)

EDV

  • RF= SV angiographic – ESV forward)

SV angiographic

left ventricular mass
Left Ventricular Mass
  • Is assumed that wall thickness is uniform
wall stress
Wall Stress
  • σ= PR

2h

  • Meridional, radial and

circunferencial.

A and B: semi-axis

regional left ventricular wall motion
REGIONAL LEFT VENTRICULAR WALL MOTION
  • Akinesis, dyskinesis, hypokinesis and hyperkinesis.