PDA?

Sonopath Forum

Hi all,

Just a quick check, I am not expecting to find a PDA in this dog with history of MVDD. When revising the videos slowly I think I can see a PDA. But probably Im wrong. I do not see particularly dilated MPA, although the RPA looks a bit wide in some angles. I put PW doppler in the area but I think it must have been too much into the Aorta and it looks like it just measured the aortic flow. No overt signs of turbulence, though. In CW doppler I do get something. attached relevant videos and photo.

Hi all,

Just a quick check, I am not expecting to find a PDA in this dog with history of MVDD. When revising the videos slowly I think I can see a PDA. But probably Im wrong. I do not see particularly dilated MPA, although the RPA looks a bit wide in some angles. I put PW doppler in the area but I think it must have been too much into the Aorta and it looks like it just measured the aortic flow. No overt signs of turbulence, though. In CW doppler I do get something. attached relevant videos and photo.

This is a 12 y old male intact schnauzer with a grade 3 heart murmmur  (It didnt sound continuous to me, but I could be wrong)and no clinical signs of CHF. SRR is vague cause owner is not consistent with the counting. He always reports is less than 30rpm. Dog was placed on vetmedin (about 3 years back, in a different vet clinic)without any xrays, or investigation, only based on grade 3 murmur. Dog was not having symptoms back then, neither, according to owner. by the time dog came to me I felt removing vetmedin after 3 years was may be not a good idea.

has a chronic hepatitis issue. no vascular congestion.

 

Thanks for any input.

Comments

EL

This looks like the CF is

This looks like the CF is simply aliasing. Need to see the PW and CW over the turbulence to see if it means anything. CF can really make somethign out of nothing wiht an oblique angle or turbulence “around a corner” like this rvot.

EL

This looks like the CF is

This looks like the CF is simply aliasing. Need to see the PW and CW over the turbulence to see if it means anything. CF can really make somethign out of nothing wiht an oblique angle or turbulence “around a corner” like this rvot.

Anonymous

Thanks. It doesn’t quite fit
Thanks. It doesn’t quite fit with pda for rest of findings. Thank ypu

Anonymous

Thanks. It doesn’t quite fit
Thanks. It doesn’t quite fit with pda for rest of findings. Thank ypu

Peter

Yes, I totally agree, it’s

Yes, I totally agree, it’s only aliasing, no PDA. What you can do if you are unsure is:

  • increase your PRF: A turbulence caused by a PDA will never disappear with a nyquist limit of 1 m/s, but aliasing will decrease (you had 0.56 m/s)
  • increase your color persistence, this helps interpreting the color Doppler

The small red signal is, in my opinion, an artifact

 

Best regards!

 

Peter

Peter

Yes, I totally agree, it’s

Yes, I totally agree, it’s only aliasing, no PDA. What you can do if you are unsure is:

  • increase your PRF: A turbulence caused by a PDA will never disappear with a nyquist limit of 1 m/s, but aliasing will decrease (you had 0.56 m/s)
  • increase your color persistence, this helps interpreting the color Doppler

The small red signal is, in my opinion, an artifact

 

Best regards!

 

Peter

Anonymous

Thank you Peter for
Thank you Peter for reassuring and tips. Actually, this is something I get all the time. Without Doppler I see a deficit of tissue between aorta and PA, in all patients, in the same spot, so I assumed it’s normal. And the aliasing. I just didn’t know how to differentiate from a real one. Next time I’ll try these tips and I’ll try to get the PW and CW in the appropriate area. History (age) should help too.
Thanks again.

Anonymous

Thank you Peter for
Thank you Peter for reassuring and tips. Actually, this is something I get all the time. Without Doppler I see a deficit of tissue between aorta and PA, in all patients, in the same spot, so I assumed it’s normal. And the aliasing. I just didn’t know how to differentiate from a real one. Next time I’ll try these tips and I’ll try to get the PW and CW in the appropriate area. History (age) should help too.
Thanks again.

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