PFO Closure for Cryptogenic Stroke: A Review and Clinical Treatment Algorithm

Area of Science:

• Cardiology
• Neurology
• Medical Devices

Background:

• Patent foramen ovale (PFO) is prevalent (25% general population, 40% cryptogenic stroke).
• The link between PFO and stroke, particularly in young individuals, remains a significant clinical question.
• Thrombus-in-transit visualized via imaging supports the mechanism of PFO-related stroke.

Purpose of the Study:

• To review the historical context and evolving evidence for patent foramen ovale closure.
• To analyze observational and randomized controlled trial data regarding PFO closure efficacy.
• To discuss recent FDA approval of dedicated PFO closure devices and propose a novel treatment algorithm.

Main Methods:

• Review of historical data and observational studies on PFO closure.
• Analysis of completed randomized controlled trials (RCTs) investigating PFO closure for stroke prevention.
• Examination of current guidelines, consensus statements, and regulatory approvals.

Main Results:

• Multiple studies and RCTs have investigated PFO closure, with varying results.
• The first dedicated PFO closure device recently received FDA approval.
• Evidence supports a role for PFO closure in specific patient populations.

Conclusions:

• PFO closure is an evolving field with increasing evidence supporting its use in select stroke patients.
• Recent advancements include dedicated closure devices and updated treatment algorithms.
• Future research will focus on new devices, ongoing trials, and expanded indications for PFO closure.