E. Zadan

Incidence and clinical course of thrombus formation on atrial septal defect and patient foramen ovale closure devices in 1,000 consecutive patients.

H. Sievert, U. Krumsdorf, K. Billinger, 2004, Journal of the American College of Cardiology.

Patent foramen ovale closure in patients with transient ischemia attack/stroke.

H. Sievert, R. Schräder, U. Krumsdorf, 2001, Journal of interventional cardiology.

Catheter closure of atrial septal defects and patent foramen ovale in patients with an atrial septal aneurysm using different devices.

H. Sievert, U. Krumsdorf, E. Zadan, 2001, Journal of interventional cardiology.

Cardiac perforation following transcatheter PFO closure

H. Sievert, U. Krumsdorf, K. Billinger, 2003, Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions.