 Unable to estimate PA systolic pressure accurately; however, on the recent transthoracic echocardiogram (which I would direct the reader to) on January 5, 2010, RVSP was calculated at 40 mmHg on that study. 
Unable to estimate PA systolic pressure accurately ; however , on the recent transthoracic echocardiogram ( which I would direct the reader to ) on January 5 , 2010 , RVSP was calculated at 40 mmHg on that study .