Ekkokardiografiske indikatorer for shunt volumen

lille

moderat

stor

Karakteristika for PDA:

Absolutte diameter (mm)

< 1,5

1,5-2,0

≥2,0

Transduktal peak systolisk hastighed m/s

>2,0

1,5-2,0

< 1,5

Pulmonal hyper perfusion

Slut-diastolisk flow hastighed i LPA (cm/sek)

<20

20-50

>50

LA:AO ratio

<1,5

1,5-2,0

>2,0

Systemisk hypoperfusion

Diastolisk flow i

Dao, MCA, PCA, CT, SMA, RA*

antegradt

ophævet

retrogradt