Transcatheter edge- to- edge form( TEER) is a safe and doable treatment option for cases presenting with atrial secondary mitral regurgitation( ASMR), according to new exploration published in JACC Cardiovascular Interventions.
Image courtesy of UCSF Health.
ASRM, the study’s authors explained, is a subtype of secondary mitral regurgitation( SMR) believed to be caused by left atrial( LA) blowup and posterior mitral annulus dilation. It's generally seen in cases with normal left ventricle size and function. TEER is the structural heart procedure that was generally known as transcatheter mitral stopcock form until 2021.
“ TEER is an arising treatment option for characteristic SMR, ” wrote Tetsu Tanaka, MD, a specialist with University Hospital Bonn in Germany, and associates. “ The procedural result of TEER depends on the underpinning mitral stopcock deconstruction. According to former reports, ASMR is generally characterized as SMR with enlarged LA and mitral annulus and smoothed circulars. These anatomical features are different from ventricular SMR( VSMR) and might thus impact the procedural results of TEER. ”
Tanaka et al. examined data from 415 cases with SMR who passed TEER at the same installation from September 2010 to September 2021. All cases were treated with the MitraClip device developed by Abbott. The mean patient age was 80 times old, and any case with a previous history of surgical or transcatheter mitral stopcock interventions was barred from the analysis.
Overall,28.4 of cases with SMR met the criteria for ASMR. The procedure’s specialized success rate was94.1 among those cases, and mitral regurgitation( MR) was reduced to ≤ 1 after TEER in79.7, a similar rate to what was seen among cases with VSMR. The in- sanitarium mortality rate was2.5.
Reviewing the echocardiography results of each case, Tanaka and associates set up that a lower LA volume indicator and advanced pamphlet- to- annulus indicator were associated with a lesser chance of MR being reduced to ≤ 1 after TEER.
“ threat position grounded on these echocardiographic parameters could help with the case selection for TEER and upgrade the procedural results of TEER in cases with ASMR. ” the authors wrote.
The group also noted that four different generations of the MitraClip device were used over the course of the study MitraClip, MitraClip NT, MitraClip NTR/ XTR and MitraClip G4. The MitraClip NTR/ XTR and MitraClip G4 bias were linked to bettered MR reduction compared to the aged- generation MitraClip and MitraClip NT bias.
“ A farther disquisition is demanded to assess that the MR reduction by TEER can ameliorate clinical issues in cases with ASMR, ” the authors concluded.
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