If my echocardiogram shows an intra‑atrial septal aneurysm with a probable patent foramen ovale, should I see a cardiologist?

Yes, you should see a cardiologist for evaluation and management of your intra-atrial septal aneurysm with probable PFO.

Given your echocardiographic findings of an atrial septal aneurysm (ASA) combined with a probable patent foramen ovale (PFO), cardiology referral is essential because this combination significantly increases your risk of paradoxical embolism and stroke, and requires specialized assessment to determine if you need intervention.

Why Cardiologist Referral is Critical

The combination of ASA with PFO is not a benign finding. An atrial septal aneurysm is often associated with septal fenestrations and represents a marker of increased embolic risk 1. The guidelines specifically note that ASA, defined as excessive bulging of the atrial septal fossa ovalis with >10mm excursion from centerline, frequently coexists with PFO and compounds stroke risk 2.

What the Cardiologist Will Do

1. Confirm the Diagnosis with Transesophageal Echocardiography (TEE)

Your current echocardiogram shows a "probable" PFO, which requires definitive confirmation. Transesophageal echocardiography has higher sensitivity for PFO detection compared with transthoracic imaging and is recommended for detailed visualization of atrial septal anatomy 1. The TEE will:

• Definitively confirm the presence and size of the PFO
• Characterize the ASA dimensions and mobility
• Assess shunt size using contrast microbubbles with Valsalva maneuver
• Rule out other embolic sources (atrial thrombi, cardiac tumors, valve vegetations) 1

2. Risk Stratification

The cardiologist will assess your stroke risk based on:

• Your age (younger patients <55 years have stronger PFO-stroke associations) 2
• Presence of ASA (which you have—this increases risk) 1
• Size of the shunt (larger shunts carry higher risk)
• History of cryptogenic stroke or TIA (if present, dramatically changes management)
• Risk of Paradoxical Embolism (RoPE) score if you've had neurological events 1

3. Determine Management Strategy

If you have NOT had a stroke or TIA:

• Most asymptomatic patients with isolated PFO and ASA are monitored
• However, the ASA component warrants closer surveillance given its association with increased embolic risk 3
• Consider antiplatelet therapy depending on other risk factors

If you HAVE had a cryptogenic stroke or TIA: The 2018 BMJ guidelines provide clear direction based on the most recent randomized trials. For patients with cryptogenic stroke and PFO, especially with ASA present, PFO closure followed by antiplatelet therapy is recommended over medical therapy alone 1. The evidence from 6 trials involving 3,560 patients demonstrates that closure reduces recurrent stroke risk, and the presence of ASA strengthens this indication 1.

Important Clinical Considerations

The ASA Component Matters

Your ASA is not just an incidental finding. Recent evidence shows that ASA can cause severe complications including arrhythmias and positional hypoxia 4, 5. The mobile, aneurysmal septum can:

• Serve as a nidus for thrombus formation on its left atrial surface 2
• Cause arrhythmias requiring intervention 5
• Lead to platypnea-orthodeoxia syndrome (positional hypoxia) 4

Workup Beyond Cardiac Imaging

The cardiologist will likely coordinate:

• Prolonged rhythm monitoring to exclude atrial fibrillation as an alternative stroke mechanism 1
• Carotid ultrasonography or CT/MRI to rule out cerebrovascular disease 1
• Evaluation for hypercoagulable states if you have thromboembolic history 2

Common Pitfalls to Avoid

1. Don't dismiss "probable" PFO findings: The word "probable" on transthoracic echo requires definitive TEE confirmation, as management hinges on accurate diagnosis 1

2. Don't wait for a stroke to occur: While most guidelines focus on secondary prevention after cryptogenic stroke, the presence of ASA with PFO warrants proactive evaluation given the increased risk profile 1, 3

3. Don't assume all PFOs are the same: The combination of PFO + ASA represents a higher-risk anatomic variant that requires specialized assessment 2, 1

Bottom Line

Schedule a cardiology appointment promptly. The cardiologist will perform definitive diagnostic testing with TEE, stratify your embolic risk, and determine whether you need percutaneous closure, antiplatelet therapy, anticoagulation, or surveillance. The presence of ASA alongside your PFO elevates this from a common incidental finding to a clinically significant structural abnormality requiring expert evaluation 1, 3.