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. 2023 Jan 23;18(12):957–976. doi: 10.4244/EIJ-D-22-00725

Table 3. Possible complications after M-TEER.

Category Complication Rate (references)
Device-related Structural failure Single leaflet device attachment 1.5%-5.1%33,34
Device embolisation 0.05%-0.70%33,119
Leaflet injury 0%-2%14,15
Functional impairment Residual MR >2+ 3.4%-17.0%14,15
Transmitral gradient >5 mmHg Up to 15%15
Procedure-related Access-site vascular Major vascular complications (significant bleeding, perforation, rupture, dissection) 1.4%-4.0%120
Cardiac structural damage Pericardial effusion or tamponade 0%-0.5%120
Haemodynamically relevant interatrial septal defect Not consistently defined
Bleeding Severe bleeding requiring blood transfusion Possible bleeding locations: access site, pericardial effusion, gastrointestinal, urinary tract 0%-17%120
Thromboembolic Myocardial infarction 0%-3%120
Stroke 0%-1%120
MR: mitral regurgitation; M-TEER: mitral valve transcatheter edge-to-edge repair