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: 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