Defaults: 1X 2X 3X 4X      
Effective Regurgitant Orifice by PISA
Pulmonary Regurgitation
Calcs>Pulmonary Regurgitation>ERO by PISA>1
Calculator
PISA Radius (r)(cm): cm
Aliasing Velocity (VA cm /sec
Vmax (m/sec) m/sec
Angle ( degrees
 
ERO cm2









 
Formula:  ERO = 2 * pi * r2 * VA * angle / 180 / Vmax
 
How to get an ERO in PR.
 
Step 1: Obtain a Zoomed CFD of the PV. In AR, a PISA formation will occur.  The distance from the center of the PISA formation to it's first aliasing velocity edge (where the color shifts from blue to red) is the radius of the PISA formation.
 
Step 2: Note the aliasing velocity. The aliasing velocity is the velocity where if the flow exceeds this velocity the flow will be displayed with colors from the opposite scale. 
 
Step 3: Obtain a continuous wave doppler (CWD) of the pulmonic valve.  The CWD of the pulmonic valve will yield a flow profile where, utilizing the calipers (or you can trace it) to show the peak velocity. 
 
Step 4: Obtain an angle of the PISA formation: The angle at the mitral valve is typically 120 degrees, whereas the angle for the aortic or pulmonic valve is typically 180 degrees.
 

Previous Page
Next Page
 
 
Instution Info  
User Info  
CME Info  
Help  
User License  
HIPAA  
Privacy Policy  
References   
Calcs   
 
CME Sponsor: University of Nebraska Medical Center - Center for Continuing Education This activity has been planned and implemented in accordance with the accreditation requirements and policies of the Accreditation Council for Continuing Medical Education through the joint providership of University of Nebraska Medical Center, Center for Continuing Education and JLS Interactive, LLC.
The University of Nebraska Medical Center, Center for Continuing Education is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians.

CE Sponsor: American Society of Radiological Technologists (ASRT)This activity is approved by the American Society of Radiologic Technologists (ASRT) as sonography-related continuing education (CE). Credit(s) issued for successful completion of ASRT-approved CE activities are accepted by the American Registry of Diagnostic Medical Sonography, American Registry of Radiological Technologists, Cardiovascular Credentialing International and Canadian Association of Registered Diagnostic Ultrasound Professionals. Contact the applicable registry for additional information / restrictions on their acceptance of ASRT CE credit.
Copyright Statement
© Copyright 2000-2018 JLS Interactive, LLC.
Content from this web site may not be used or reproduced for non-personal or
commercial purposes without express written permission by JLS Interactive, LLC.