Cardiology MCQ 274: Detection of right to left shunt across PFO
Which of the following tests can be used to detect right to left shunting across a patent foramen ovale (PFO)?
a. Saline contrast echocardiography
b. Trans cranial Doppler
c. Ear oximetry
d. All of the above
e. None of the above
["Click here for the answer with explanation", "Correct Answer:"]
d. All of the above
Saline contrast echocardiography using agitated saline is used to detect right to left shunting across a PFO. Trans cranial Doppler can be used to detect micro bubbles in the middle cerebral artery after injection of agitated saline into a peripheral vein. Ear oximetry can detect fluctuations in oxygen saturation due to right to left shunt across the PFO.
Source: Cardiophile MD - Category: Cardiology Authors: Prof. Dr. Johnson Francis MD, DM, FACC, FRCP Edin, FRCP London Tags: Cardiology MCQ DM / DNB Cardiology Entrance agitated saline into a peripheral vein Detection of right to left shunt across PFO Ear oximetry patent foramen ovale right to left shunt across the PFO saline contrast echocardiography Trans cran Source Type: blogs