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Aortic outflow profile

  • 10 year old FN Springer Spaniel with a cough and suspected pulmonary disease
  • The echo showed very mild mitral insufficiency and ECG sinus arrythmia. 
  • My query is with the variable aortic outflow profile, why so much variety in outflow velocity without a significant arrhythmia? There was movement artefact on the ECG recording at the time but the HR was approx 80 bpm. I felt like the allignment was acceptable. 
  • Many thanks

  • 10 year old FN Springer Spaniel with a cough and suspected pulmonary disease
  • The echo showed very mild mitral insufficiency and ECG sinus arrythmia. 
  • My query is with the variable aortic outflow profile, why so much variety in outflow velocity without a significant arrhythmia? There was movement artefact on the ECG recording at the time but the HR was approx 80 bpm. I felt like the allignment was acceptable. 
  • Many thanks

veteurope1

3 responses to “Aortic outflow profile”

  1. Hi!
    Usually, long previous

    Hi!

    Usually, long previous R-R intervals create high stroke volumes, short intervals create low stroke volumes (as reflected in outflow velocities).

    If the R-R intervals are regular, differences in outflow velocities are likely to be caused by differences in systolic function or diastolic filling:

    • e.g. a bundle branch block may cause a lower outflow velocity due to a uncoordinated contraction.
    • differences in diastolic filling can be caused due to increased airway resistance (e.g. bronchial disease) which causes increased respiratory effort and intrathoracic pressure changes

     

    Best regards,

    Peter

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