Tests Cera occluder device for patent foramen ovale in people with cryptogenic stroke

Who can take part

• Patients aged 18-60 years
• Be able to understand the purpose of the experiment, voluntarily participate in the experiment and sign the informed consent
• Patent foramen ovale was confirmed by at least one of the following conditions exists:; Patent foramen ovale was confirmed by Transthoracic echocardiography (TTE) or Transesophageal echocardiography (TEE); The presence of medium or large right-to-left shunt was confirmed by Right-heart acoustic contrast (cTTE or cTCD)
• It meets the clinical status of patent foramen ovale plugging indication, and at least one of the following conditions exists:; Cryptogenic stroke complicated with patent foramen ovale, combined with one or more clinical risk factors; Cryptogenic stroke complicated with patent foramen ovale, combined with one or more anatomical risk factors of patent foramen ovale; Cryptogenic stroke complicated with patent foramen ovale, with clear deep vein thrombosis or pulmonary embolism, and not suitable for anticoagulant therapy; Cryptogenic stroke complicated with patent foramen ovale, but still recurred with antiplatelet or anticoagulant therapy

Who cannot take part

• Mitral/aortic disease: including mitral stenosis or severe mitral regurgitation of any cause, severe aortic stenosis or severe aortic regurgitation, mitral or aortic valve vegetations or prior valve replacement surgery
• Participate in clinical trials of other drugs or medical devices within three months
• Patients with intracardiac thrombosis or tumor, intracardiac vegetations
• Acute myocardial infarction or unstable angina within 6 months
• Left ventricular aneurysm formation or left ventricular wall movement disorder
• Patients with active endocarditis or other untreated infections or other hemorrhagic diseases
• Pulmonary hypertension or patent foramen ovale was a special channel
• Uncontrolled hypertension (> 180/100 mmHg)
• Contraindication of antiplatelet or anticoagulant therapy, such as severe bleeding within 3 months, obvious retinopathy, history of other intracranial bleeding, and obvious intracranial diseases
• Coronary heart disease, hypertension, diabetes and other vascular diseases that are poorly controlled by drugs or other means
• Thrombosis exists at the location or route of implantation
• Malignant neoplasms or other diseases with a life expectancy of less than 2 years
• Dilated cardiomyopathy, LVEF < 35%, or other severe heart failure
• Liver and kidney function impairment (ALT or AST > 3 times the upper limit of normal value, serum creatinine (Cr) > 2 times the upper limit of normal value)
• Carotid atherosclerotic stenosis was determined by the investigator based on CT or vascular ultrasound (> 50%)
• Large cerebral infarction occurred within 4 weeks (MR/CT or DWI image ASPECTS score <6 points or infarction volume ≥70 ml or infarction area > 1/3 middle cerebral artery blood supply area)
• Patients with right-to-left shunt due to other causes, including atrial septal defect or perforated diaphragm
• Atrial fibrillation/atrial flutter (chronic or intermittent)
• Pregnant or planning to become pregnant during the trial
• The investigator determined that the patient was not suitable for implantation of PFO occluder (for example, the diameter of the base of the atrial septal tumor ≥25mm and the size of the foramen ovale ≥5mm) or the patient has contraindications for implantation of PFO occluder
• Patients who could not be followed up during the trial