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Implications of Acute Brain Injury Following Transcatheter Aortic Valve Replacement.
Implications of Acute Brain Injury Following Transcatheter Aortic Valve Replacement.

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자료유형  
 학위논문
Control Number  
0017160665
International Standard Book Number  
9798382321912
Dewey Decimal Classification Number  
610
Main Entry-Personal Name  
Grubman, Daniel.
Publication, Distribution, etc. (Imprint  
[S.l.] : Yale University., 2024
Publication, Distribution, etc. (Imprint  
Ann Arbor : ProQuest Dissertations & Theses, 2024
Physical Description  
64 p.
General Note  
Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
General Note  
Advisor: Lansky, Alexandra.
Dissertation Note  
Thesis (M.D.)--Yale University, 2024.
Summary, Etc.  
요약Stroke is a feared complication of transcatheter aortic valve replacement (TAVR), affecting 2-8% of patients at 30 days. Beyond clinically evident stroke, covert brain injury (CBI) defined as clinically silent evidence of brain injury on imaging is strikingly prevalent: 70-100% of patients have evidence of new infarcts on diffusion-weighted magnetic resonance imaging (DW-MRI). The clinical significance of these lesions is unknown. Recent guidance has highlighted the importance of imaging in the assessment of cerebral embolic protection (CEP) devices that aim to counter the debris generated during TAVR. This work aims to a) determine the clinical significance of new ischemic lesions, b) propose metrics for ischemic lesion burden, and c) identify factors associated with stroke and CBI, including their association with surgical risk as defined by the Society of Thoracic Surgeons Predicted Risk of Mortality STS score.Patient-level data were pooled from 4 prospective multicenter TAVR studies (DEFLECT III [N=87], NeuroTAVR [N=44], REFLECT I [N=258], and REFLECT II [N=214]). All studies shared a common independent imaging core laboratory and clinical event adjudication committee. DW-MRI were assessed for total lesion number (TLN) per subject, individual lesion volumes (ILV), and total lesion volume (TLV). Receiver operating characteristic (ROC) analysis was performed to identify the optimal DW-MRI measure and thresholds to discriminate ischemic stroke at 30 days.A total of 495 of 603 patients undergoing TAVR completed DW-MRI, with 97% clinical follow-up at 30 days. At 30 days, the rates of death, ischemic stroke, and disabling stroke were 0.8%, 6.9%, and 3.1%. New ischemic lesions were observed in 85% of patients, with a mean TLN of 5.5±7.3 per patient, a mean ILV of 78.2±257.1 mm3 , and a mean TLV of 555±1039 mm3 . The area under the ROC curve was 0.84 for TLV with an optimal cut point of 440 mm3 (Youden criteria) to 547 mm3 (distance 0,1 criteria), 0.82 for maximum ILV (cut point 216 mm3 by both criteria), and 0.81 for TLN (cut point 4-5 lesions). Compared with patients with a TLV ≤500 mm3 , patients with TLV 500mm3 had more ischemic stroke at 30 days (18.2% vs 2.3%, p0.001), more disabling strokes (8.8 vs 0.9%, p0.001), and less complete stroke recovery (44 vs 62.5%, p=0.001). Stroke was independently associated with older age, self-expanding valve use, and worse baseline MoCA and mRS scores. While low (8%) STS PROM predicted mortality at 30 days, stroke rates did not differ across the STS risk groups.This patient-level pooled analysis is the first to demonstrate that acute brain injury measures on DW-MRI can discriminate clinical ischemic stroke and worse recovery in patients undergoing TAVR. A TLV threshold of 500 mm3 had excellent discrimination when categorizing patients with ischemic and disabling stroke. Thresholds of TLN 5 and maximum ILV of 200 mm3 also performed strongly. Our study provides new measures to better predict clinical outcomes of patients undergoing TAVR that will enable better initial evaluation of the efficacy of preventive CEP devices in future trials.
Subject Added Entry-Topical Term  
Medicine.
Subject Added Entry-Topical Term  
Medical imaging.
Subject Added Entry-Topical Term  
Biomedical engineering.
Subject Added Entry-Topical Term  
Health sciences.
Subject Added Entry-Topical Term  
Surgery.
Index Term-Uncontrolled  
Cerebral embolic protection
Index Term-Uncontrolled  
Covert brain injury
Index Term-Uncontrolled  
Magnetic resonance imaging
Index Term-Uncontrolled  
Stroke
Index Term-Uncontrolled  
Transcatheter aortic valve replacement
Added Entry-Corporate Name  
Yale University Yale School of Medicine
Host Item Entry  
Dissertations Abstracts International. 85-11B.
Electronic Location and Access  
로그인을 한후 보실 수 있는 자료입니다.
Control Number  
joongbu:658570

MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a610
■1001  ▼aGrubman,  Daniel.
■24510▼aImplications  of  Acute  Brain  Injury  Following  Transcatheter  Aortic  Valve  Replacement.
■260    ▼a[S.l.]▼bYale  University.  ▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a64  p.
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-11,  Section:  B.
■500    ▼aAdvisor:  Lansky,  Alexandra.
■5021  ▼aThesis  (M.D.)--Yale  University,  2024.
■520    ▼aStroke  is  a  feared  complication  of  transcatheter  aortic  valve  replacement  (TAVR),  affecting  2-8%  of  patients  at  30  days.  Beyond  clinically  evident  stroke,  covert  brain  injury  (CBI)  defined  as  clinically  silent  evidence  of  brain  injury  on  imaging  is  strikingly  prevalent:  70-100%  of  patients  have  evidence  of  new  infarcts  on  diffusion-weighted  magnetic  resonance  imaging  (DW-MRI).  The  clinical  significance  of  these  lesions  is  unknown.  Recent  guidance  has  highlighted  the  importance  of  imaging  in  the  assessment  of  cerebral  embolic  protection  (CEP)  devices  that  aim  to  counter  the  debris  generated  during  TAVR.  This  work  aims  to  a)  determine  the  clinical  significance  of  new  ischemic  lesions,  b)  propose  metrics  for  ischemic  lesion  burden,  and  c)  identify  factors  associated  with  stroke  and  CBI,  including  their  association  with  surgical  risk  as  defined  by  the  Society  of  Thoracic  Surgeons  Predicted  Risk  of  Mortality  STS  score.Patient-level  data  were  pooled  from  4  prospective  multicenter  TAVR  studies  (DEFLECT  III  [N=87],  NeuroTAVR  [N=44],  REFLECT  I  [N=258],  and  REFLECT  II  [N=214]).  All  studies  shared  a  common  independent  imaging  core  laboratory  and  clinical  event  adjudication  committee.  DW-MRI  were  assessed  for  total  lesion  number  (TLN)  per  subject,  individual  lesion  volumes  (ILV),  and  total  lesion  volume  (TLV).  Receiver  operating  characteristic  (ROC)  analysis  was  performed  to  identify  the  optimal  DW-MRI  measure  and  thresholds  to  discriminate  ischemic  stroke  at  30  days.A  total  of  495  of  603  patients  undergoing  TAVR  completed  DW-MRI,  with  97%  clinical  follow-up  at  30  days.  At  30  days,  the  rates  of  death,  ischemic  stroke,  and  disabling  stroke  were  0.8%,  6.9%,  and  3.1%.  New  ischemic  lesions  were  observed  in  85%  of  patients,  with  a  mean  TLN  of  5.5±7.3  per  patient,  a  mean  ILV  of  78.2±257.1  mm3  ,  and  a  mean  TLV  of  555±1039  mm3  .  The  area  under  the  ROC  curve  was  0.84  for  TLV  with  an  optimal  cut  point  of  440  mm3  (Youden  criteria)  to  547  mm3  (distance  0,1  criteria),  0.82  for  maximum  ILV  (cut  point  216  mm3  by  both  criteria),  and  0.81  for  TLN  (cut  point  4-5  lesions).  Compared  with  patients  with  a  TLV  ≤500  mm3  ,  patients  with  TLV  500mm3  had  more  ischemic  stroke  at  30  days  (18.2%  vs  2.3%,  p0.001),  more  disabling  strokes  (8.8  vs  0.9%,  p0.001),  and  less  complete  stroke  recovery  (44  vs  62.5%,  p=0.001).  Stroke  was  independently  associated  with  older  age,  self-expanding  valve  use,  and  worse  baseline  MoCA  and  mRS  scores.  While  low  (8%)  STS  PROM  predicted  mortality  at  30  days,  stroke  rates  did  not  differ  across  the  STS  risk  groups.This  patient-level  pooled  analysis  is  the  first  to  demonstrate  that  acute  brain  injury  measures  on  DW-MRI  can  discriminate  clinical  ischemic  stroke  and  worse  recovery  in  patients  undergoing  TAVR.  A  TLV  threshold  of  500  mm3  had  excellent  discrimination  when  categorizing  patients  with  ischemic  and  disabling  stroke.  Thresholds  of  TLN  5  and  maximum  ILV  of  200  mm3  also  performed  strongly.  Our  study  provides  new  measures  to  better  predict  clinical  outcomes  of  patients  undergoing  TAVR  that  will  enable  better  initial  evaluation  of  the  efficacy  of  preventive  CEP  devices  in  future  trials.
■590    ▼aSchool  code:  0265.
■650  4▼aMedicine.
■650  4▼aMedical  imaging.
■650  4▼aBiomedical  engineering.
■650  4▼aHealth  sciences.
■650  4▼aSurgery.
■653    ▼aCerebral  embolic  protection
■653    ▼aCovert  brain  injury
■653    ▼aMagnetic  resonance  imaging
■653    ▼aStroke
■653    ▼aTranscatheter  aortic  valve  replacement
■690    ▼a0564
■690    ▼a0574
■690    ▼a0576
■690    ▼a0566
■690    ▼a0541
■71020▼aYale  University▼bYale  School  of  Medicine.
■7730  ▼tDissertations  Abstracts  International▼g85-11B.
■790    ▼a0265
■791    ▼aM.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160665▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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