Swartz Sheath With Angioplasty Guidewire-Assisted Versus Conventional Technique for Patent Foramen Ovale Closure: A Multicenter Randomized Controlled Trial

In cases of complex PFO, failure of guidewire passage through the septum can occur, rendering closure impossible. The present multicenter, prospective, randomized controlled trial aims to evaluate the efficacy and safety of a novel Swartz sheath with angioplasty guidewire-assisted technique to facilitate PFO tunnel passage.

With written consent, the investigators expect to enrol PFO patients with a history of cryptogenic stroke (CS) or transient ischemic attack (TIA), who requires PFO closure according to current guidelines. A standardized TEE protocol is used to assess the morphologic characteristics of the atrial septum and right-to-left shunting through PFO. Eligible patients are prospectively and randomly assigned to the Swartz sheath + angioplasty guidewire group or the conventional group (1:1 ratio). In the Swartz sheath + angioplasty guidewire group, the PFO closure procedure is performed with Swartz sheath + angioplasty guidewire assistance. In the conventional group, the PFO closure procedure is performed with a multi-functional catheter. After the procedure, safety parameters such as contrast use, procedure time, and severe complications are recorded. All patients are followed up at 1-, 3-, 6-, and 12- month post device implantation. The presence of a residual shunt, device embolization, device migration and residual shunt are recorded.