AMA Category 1 Credit for Physicians Only.
ASRT CME is not available.
|Go to the EOTD Archive|
The videos show the left upper and right upper pulmonary veins. Pulmonary vein Doppler exhibits a systolic and diastolic flow and an atrial wave during the cardiac cycle. During aging, the diastolic wave exceeds the systolic wave in the young, becomes equalized in middle ages (50's), and the systolic wave dominates in the elderly. Cardioversion can stun the left atrium and the atrial wave can be minimal or nonexistent while the atrium recovers.
One study looked at pulmonary vein flow after cardioversion and found that re-establishment of a systolic dominance of the pulmonary vein flow pattern was predictive of patient's remaining in sinus rhythm 1 year later. While one wouldn't think there would be any difference in which vein was used for Doppler examination, they did find that if the systolic flow fraction exceeded 0.5 in the right upper pulmonary vein, that it was predictive that 95% of patients would remain in normal sinus rhythm.
|Please answer the following questions correctly to obtain your CME.|