interatrial septal aneurysm and mildy dialated main pulmonary artery

I was diagnosed with an interatrial septal aneurysm on a routine stress echo test, there is no clear interatrial communication but there is a Qp:Qs of 2.2 with an MPA of 2.9 cm
1. can I have an aneurysm with the elvated QP:Qs and mildly diated MPA and not have a PFO or a shunt, I read the elevated Qp:Qs and dialated MPA with the aneurysm indicate a PFO or shunt.
2. Is the mildly dialated MPA and elevated Qp:Qs something to worry about, I'm a 59 year old male.

[CCF-M.D.-PPB]

The elevated Qp/QS indicates shunt from left side to right side of the heart that can in the long term lead to elevated pulmonary pressures.  The elevated pulmonary pressures can cause damage to the lung which ultimately may lead to dilation of pulmonary arteries.  Of course, all of this has to fit some type of a clinical picture.  In a 59 year old male with no symptoms those results should be confirmed either with an echocardiogram or a cardiac MRI to assess for presence of a shunt.  It is possible that those results are false positives, however, given the ramifications of elevated pulmonary pressures due to shunting and the fact that all this can be easily repaired, one should have this worked up further.  Atiral septal defect could cause this and should be ruled out.

[siezq]

A related discussion, iinreratrial septal anyurism was started.