Patent Ductus Arteriosus -PDA Flashcards
PDA feature in LV ?
UWorld
- dec Preload
- inc Afterload
- dec Stroke V
- dec Cardiac output
UW
PDA feature in aorta & LA ?
UW
- LA= dec Pulmonary venous return
- Aorta = inc Diastolic blood pressure
UWorld
Complications of PDA ?
UW
- Lower extremities Clubbing
- Cyanosis
- Eisenmenger syndrome
UW
Ductus arteriosus from which aortic arch ?
UW
6th Embryonic aortic arch
Eisenmenger syndrome ??
UW
Reversal left to right to right to left shunt flow
UW
PDA which shunt ?
UW
Left to Right shunt
PDA vs TOF/Large septal deffects ?
UW
PDA= Lower extremities cyanosis
FOT / LSD= whole body cyanosis
UW
Continus machine like murmur is heard where ?
UWorld
- Left infraclavicular region
- Post interscapular region
UWorld
Tx of PDA ?
UW
Indomethacin
=PGE2 synthesis inhibitor
Tx of PDA in adult ??
UW
Surgical ligation
After birth
Pulmonary Vas cular Resistance dec = P Pressure dec
Sytemic vascular resistance inc = Systemic P inc this is the pressure change in PA & Aorta
UW
the patent ductus arteriosus (PDA) murmur evolves from systolic only to
continuous before the PDA closes and the murmur disappears.
PDA
left to right shunt we know that
O2 condition in PA and chambers ??
UWorld
PA= O2 higher than expected concentration
Left and right heart chambers = O2 saturation normal / unchanged
UWorld
Common occurance of PDA ?
UW
It most commonly occurs in patients born prematurely and those with cyanotic congenital heart disease
Patency of the ductus arteriosus is maintained in utero HOW >?
UW
utero due to placental production of prostaglandin E2 (PGE2) and
low oxygen levels in the fetal circulation
PDA clinical presentation in infants ??
UWorld
-elevated postnatal PGE2
-continuous murmur
-widened pulse pressure
-bounding pulses in a preterm infant
