Anterior Leaflet Laceration to Prevent Ventricular Outflow Tract Obstruction During Transcatheter Mitral Valve Replacement

Left ventricular outflow tract (LVOT) obstruction is a leading cause of mortality and exclusion from transcatheter mitral valve replacement (TMVR). Intentional laceration of the anterior mitral valve leaflet to prevent LVOT obstruction (LAMPOON) is a transcatheter mimic of surgical chord-sparing lea...

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Published inJournal of the American College of Cardiology Vol. 73; no. 20; pp. 2521 - 2534
Main Authors Khan, Jaffar M., Babaliaros, Vasilis C., Greenbaum, Adam B., Foerst, Jason R., Yazdani, Shahram, McCabe, James M., Paone, Gaetano, Eng, Marvin H., Leshnower, Bradley G., Gleason, Patrick T., Chen, Marcus Y., Wang, Dee Dee, Tian, Xin, Stine, Annette M., Rogers, Toby, Lederman, Robert J.
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 28.05.2019
Elsevier Limited
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Abstract Left ventricular outflow tract (LVOT) obstruction is a leading cause of mortality and exclusion from transcatheter mitral valve replacement (TMVR). Intentional laceration of the anterior mitral valve leaflet to prevent LVOT obstruction (LAMPOON) is a transcatheter mimic of surgical chord-sparing leaflet resection. The purpose of this prospective multicenter trial was to study LAMPOON with transseptal (Edwards Lifesciences, Irvine, California) TMVR in annuloplasty rings or native mitral annular calcification (MAC). Subjects at high or extreme surgical risk and prohibitive risk of LVOT obstruction from TMVR were included. Eligibility was modified midtrial to exclude subjects with threatened LVOT obstruction from a Sapien 3 valve fabric skirt. The primary endpoint was procedure survival with successful LAMPOON, with successful TMVR, without reintervention, and with LVOT gradient <30 mm Hg (“optimal”) or <50 mm Hg (“acceptable”). Secondary endpoints included 30-day mortality and major adverse cardiovascular events. There was universal source-data verification and independent monitoring. All endpoints were independently adjudicated. Central laboratories analyzed echocardiogram and CT images. Between June 2017 and June 2018, 30 subjects were enrolled equally between the MAC and ring arms. LAMPOON traversal and midline laceration was successful in 100%. Procedure survival was 100%, and 30-day survival was 93%. Primary success was achieved in 73%, driven by additional procedures for paravalvular leak (10%) and high-skirt neo-LVOT gradients observed before a protocol amendment. There were no strokes. LAMPOON was feasible in native and annuloplasty ring anatomies in patients who were otherwise ineligible for treatment, with acceptable safety. LAMPOON was effective in preventing LVOT obstruction from TMVR. Despite LAMPOON, TMVR using Sapien 3 in annuloplasty rings and MAC still exhibits important limitations. (NHLBI DIR LAMPOON Study: Intentional Laceration of the Anterior Mitral Leaflet to Prevent Left Ventricular Outflow Tract Obstruction During Transcatheter Mitral Valve Implantation; NCT03015194) [Display omitted]
AbstractList Left ventricular outflow tract (LVOT) obstruction is a leading cause of mortality and exclusion from transcatheter mitral valve replacement (TMVR). Intentional laceration of the anterior mitral valve leaflet to prevent LVOT obstruction (LAMPOON) is a transcatheter mimic of surgical chord-sparing leaflet resection. The purpose of this prospective multicenter trial was to study LAMPOON with transseptal (Edwards Lifesciences, Irvine, California) TMVR in annuloplasty rings or native mitral annular calcification (MAC). Subjects at high or extreme surgical risk and prohibitive risk of LVOT obstruction from TMVR were included. Eligibility was modified midtrial to exclude subjects with threatened LVOT obstruction from a Sapien 3 valve fabric skirt. The primary endpoint was procedure survival with successful LAMPOON, with successful TMVR, without reintervention, and with LVOT gradient <30 mm Hg (“optimal”) or <50 mm Hg (“acceptable”). Secondary endpoints included 30-day mortality and major adverse cardiovascular events. There was universal source-data verification and independent monitoring. All endpoints were independently adjudicated. Central laboratories analyzed echocardiogram and CT images. Between June 2017 and June 2018, 30 subjects were enrolled equally between the MAC and ring arms. LAMPOON traversal and midline laceration was successful in 100%. Procedure survival was 100%, and 30-day survival was 93%. Primary success was achieved in 73%, driven by additional procedures for paravalvular leak (10%) and high-skirt neo-LVOT gradients observed before a protocol amendment. There were no strokes. LAMPOON was feasible in native and annuloplasty ring anatomies in patients who were otherwise ineligible for treatment, with acceptable safety. LAMPOON was effective in preventing LVOT obstruction from TMVR. Despite LAMPOON, TMVR using Sapien 3 in annuloplasty rings and MAC still exhibits important limitations. (NHLBI DIR LAMPOON Study: Intentional Laceration of the Anterior Mitral Leaflet to Prevent Left Ventricular Outflow Tract Obstruction During Transcatheter Mitral Valve Implantation; NCT03015194) [Display omitted]
Left ventricular outflow tract (LVOT) obstruction is a leading cause of mortality and exclusion from transcatheter mitral valve replacement (TMVR). Intentional laceration of the anterior mitral valve leaflet to prevent LVOT obstruction (LAMPOON) is a transcatheter mimic of surgical chord-sparing leaflet resection. The purpose of this prospective multicenter trial was to study LAMPOON with transseptal (Edwards Lifesciences, Irvine, California) TMVR in annuloplasty rings or native mitral annular calcification (MAC). Subjects at high or extreme surgical risk and prohibitive risk of LVOT obstruction from TMVR were included. Eligibility was modified midtrial to exclude subjects with threatened LVOT obstruction from a Sapien 3 valve fabric skirt. The primary endpoint was procedure survival with successful LAMPOON, with successful TMVR, without reintervention, and with LVOT gradient <30 mm Hg ("optimal") or <50 mm Hg ("acceptable"). Secondary endpoints included 30-day mortality and major adverse cardiovascular events. There was universal source-data verification and independent monitoring. All endpoints were independently adjudicated. Central laboratories analyzed echocardiogram and CT images. Between June 2017 and June 2018, 30 subjects were enrolled equally between the MAC and ring arms. LAMPOON traversal and midline laceration was successful in 100%. Procedure survival was 100%, and 30-day survival was 93%. Primary success was achieved in 73%, driven by additional procedures for paravalvular leak (10%) and high-skirt neo-LVOT gradients observed before a protocol amendment. There were no strokes. LAMPOON was feasible in native and annuloplasty ring anatomies in patients who were otherwise ineligible for treatment, with acceptable safety. LAMPOON was effective in preventing LVOT obstruction from TMVR. Despite LAMPOON, TMVR using Sapien 3 in annuloplasty rings and MAC still exhibits important limitations. (NHLBI DIR LAMPOON Study: Intentional Laceration of the Anterior Mitral Leaflet to Prevent Left Ventricular Outflow Tract Obstruction During Transcatheter Mitral Valve Implantation; NCT03015194).
AbstractBackgroundLeft ventricular outflow tract (LVOT) obstruction is a leading cause of mortality and exclusion from transcatheter mitral valve replacement (TMVR). Intentional laceration of the anterior mitral valve leaflet to prevent LVOT obstruction (LAMPOON) is a transcatheter mimic of surgical chord-sparing leaflet resection. ObjectivesThe purpose of this prospective multicenter trial was to study LAMPOON with transseptal (Edwards Lifesciences, Irvine, California) TMVR in annuloplasty rings or native mitral annular calcification (MAC). MethodsSubjects at high or extreme surgical risk and prohibitive risk of LVOT obstruction from TMVR were included. Eligibility was modified midtrial to exclude subjects with threatened LVOT obstruction from a Sapien 3 valve fabric skirt. The primary endpoint was procedure survival with successful LAMPOON, with successful TMVR, without reintervention, and with LVOT gradient <30 mm Hg (“optimal”) or <50 mm Hg (“acceptable”). Secondary endpoints included 30-day mortality and major adverse cardiovascular events. There was universal source-data verification and independent monitoring. All endpoints were independently adjudicated. Central laboratories analyzed echocardiogram and CT images. ResultsBetween June 2017 and June 2018, 30 subjects were enrolled equally between the MAC and ring arms. LAMPOON traversal and midline laceration was successful in 100%. Procedure survival was 100%, and 30-day survival was 93%. Primary success was achieved in 73%, driven by additional procedures for paravalvular leak (10%) and high-skirt neo-LVOT gradients observed before a protocol amendment. There were no strokes. ConclusionsLAMPOON was feasible in native and annuloplasty ring anatomies in patients who were otherwise ineligible for treatment, with acceptable safety. LAMPOON was effective in preventing LVOT obstruction from TMVR. Despite LAMPOON, TMVR using Sapien 3 in annuloplasty rings and MAC still exhibits important limitations. (NHLBI DIR LAMPOON Study: Intentional Laceration of the Anterior Mitral Leaflet to Prevent Left Ventricular Outflow Tract Obstruction During Transcatheter Mitral Valve Implantation; NCT03015194)
Left ventricular outflow tract (LVOT) obstruction is a leading cause of mortality and exclusion from transcatheter mitral valve replacement (TMVR). Intentional laceration of the anterior mitral valve leaflet to prevent LVOT obstruction (LAMPOON) is a transcatheter mimic of surgical chord-sparing leaflet resection.BACKGROUNDLeft ventricular outflow tract (LVOT) obstruction is a leading cause of mortality and exclusion from transcatheter mitral valve replacement (TMVR). Intentional laceration of the anterior mitral valve leaflet to prevent LVOT obstruction (LAMPOON) is a transcatheter mimic of surgical chord-sparing leaflet resection.The purpose of this prospective multicenter trial was to study LAMPOON with transseptal (Edwards Lifesciences, Irvine, California) TMVR in annuloplasty rings or native mitral annular calcification (MAC).OBJECTIVESThe purpose of this prospective multicenter trial was to study LAMPOON with transseptal (Edwards Lifesciences, Irvine, California) TMVR in annuloplasty rings or native mitral annular calcification (MAC).Subjects at high or extreme surgical risk and prohibitive risk of LVOT obstruction from TMVR were included. Eligibility was modified midtrial to exclude subjects with threatened LVOT obstruction from a Sapien 3 valve fabric skirt. The primary endpoint was procedure survival with successful LAMPOON, with successful TMVR, without reintervention, and with LVOT gradient <30 mm Hg ("optimal") or <50 mm Hg ("acceptable"). Secondary endpoints included 30-day mortality and major adverse cardiovascular events. There was universal source-data verification and independent monitoring. All endpoints were independently adjudicated. Central laboratories analyzed echocardiogram and CT images.METHODSSubjects at high or extreme surgical risk and prohibitive risk of LVOT obstruction from TMVR were included. Eligibility was modified midtrial to exclude subjects with threatened LVOT obstruction from a Sapien 3 valve fabric skirt. The primary endpoint was procedure survival with successful LAMPOON, with successful TMVR, without reintervention, and with LVOT gradient <30 mm Hg ("optimal") or <50 mm Hg ("acceptable"). Secondary endpoints included 30-day mortality and major adverse cardiovascular events. There was universal source-data verification and independent monitoring. All endpoints were independently adjudicated. Central laboratories analyzed echocardiogram and CT images.Between June 2017 and June 2018, 30 subjects were enrolled equally between the MAC and ring arms. LAMPOON traversal and midline laceration was successful in 100%. Procedure survival was 100%, and 30-day survival was 93%. Primary success was achieved in 73%, driven by additional procedures for paravalvular leak (10%) and high-skirt neo-LVOT gradients observed before a protocol amendment. There were no strokes.RESULTSBetween June 2017 and June 2018, 30 subjects were enrolled equally between the MAC and ring arms. LAMPOON traversal and midline laceration was successful in 100%. Procedure survival was 100%, and 30-day survival was 93%. Primary success was achieved in 73%, driven by additional procedures for paravalvular leak (10%) and high-skirt neo-LVOT gradients observed before a protocol amendment. There were no strokes.LAMPOON was feasible in native and annuloplasty ring anatomies in patients who were otherwise ineligible for treatment, with acceptable safety. LAMPOON was effective in preventing LVOT obstruction from TMVR. Despite LAMPOON, TMVR using Sapien 3 in annuloplasty rings and MAC still exhibits important limitations. (NHLBI DIR LAMPOON Study: Intentional Laceration of the Anterior Mitral Leaflet to Prevent Left Ventricular Outflow Tract Obstruction During Transcatheter Mitral Valve Implantation; NCT03015194).CONCLUSIONSLAMPOON was feasible in native and annuloplasty ring anatomies in patients who were otherwise ineligible for treatment, with acceptable safety. LAMPOON was effective in preventing LVOT obstruction from TMVR. Despite LAMPOON, TMVR using Sapien 3 in annuloplasty rings and MAC still exhibits important limitations. (NHLBI DIR LAMPOON Study: Intentional Laceration of the Anterior Mitral Leaflet to Prevent Left Ventricular Outflow Tract Obstruction During Transcatheter Mitral Valve Implantation; NCT03015194).
BackgroundLeft ventricular outflow tract (LVOT) obstruction is a leading cause of mortality and exclusion from transcatheter mitral valve replacement (TMVR). Intentional laceration of the anterior mitral valve leaflet to prevent LVOT obstruction (LAMPOON) is a transcatheter mimic of surgical chord-sparing leaflet resection.ObjectivesThe purpose of this prospective multicenter trial was to study LAMPOON with transseptal (Edwards Lifesciences, Irvine, California) TMVR in annuloplasty rings or native mitral annular calcification (MAC).MethodsSubjects at high or extreme surgical risk and prohibitive risk of LVOT obstruction from TMVR were included. Eligibility was modified midtrial to exclude subjects with threatened LVOT obstruction from a Sapien 3 valve fabric skirt. The primary endpoint was procedure survival with successful LAMPOON, with successful TMVR, without reintervention, and with LVOT gradient <30 mm Hg (“optimal”) or <50 mm Hg (“acceptable”). Secondary endpoints included 30-day mortality and major adverse cardiovascular events. There was universal source-data verification and independent monitoring. All endpoints were independently adjudicated. Central laboratories analyzed echocardiogram and CT images.ResultsBetween June 2017 and June 2018, 30 subjects were enrolled equally between the MAC and ring arms. LAMPOON traversal and midline laceration was successful in 100%. Procedure survival was 100%, and 30-day survival was 93%. Primary success was achieved in 73%, driven by additional procedures for paravalvular leak (10%) and high-skirt neo-LVOT gradients observed before a protocol amendment. There were no strokes.ConclusionsLAMPOON was feasible in native and annuloplasty ring anatomies in patients who were otherwise ineligible for treatment, with acceptable safety. LAMPOON was effective in preventing LVOT obstruction from TMVR. Despite LAMPOON, TMVR using Sapien 3 in annuloplasty rings and MAC still exhibits important limitations. (NHLBI DIR LAMPOON Study: Intentional Laceration of the Anterior Mitral Leaflet to Prevent Left Ventricular Outflow Tract Obstruction During Transcatheter Mitral Valve Implantation; NCT03015194)
Author Wang, Dee Dee
McCabe, James M.
Gleason, Patrick T.
Lederman, Robert J.
Rogers, Toby
Khan, Jaffar M.
Foerst, Jason R.
Paone, Gaetano
Eng, Marvin H.
Babaliaros, Vasilis C.
Tian, Xin
Leshnower, Bradley G.
Greenbaum, Adam B.
Chen, Marcus Y.
Stine, Annette M.
Yazdani, Shahram
AuthorAffiliation e Inova Fairfax Hospital, Fairfax, Virginia
a Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
f University of Washington, Seattle, Washington
d Carilion Roanoke Memorial Hospital, Roanoke, Virginia
h Medstar Washington Hospital Center, Washington, DC
b Structural Heart and Valve Center, Emory University Hospital, Atlanta, Georgia
g Office of Biostatistics Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
c Center for Structural Heart Disease, Division of Cardiology, and Division of Cardiac Surgery, Henry Ford Health System, Detroit, Michigan
AuthorAffiliation_xml – name: c Center for Structural Heart Disease, Division of Cardiology, and Division of Cardiac Surgery, Henry Ford Health System, Detroit, Michigan
– name: a Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
– name: d Carilion Roanoke Memorial Hospital, Roanoke, Virginia
– name: f University of Washington, Seattle, Washington
– name: e Inova Fairfax Hospital, Fairfax, Virginia
– name: g Office of Biostatistics Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
– name: h Medstar Washington Hospital Center, Washington, DC
– name: b Structural Heart and Valve Center, Emory University Hospital, Atlanta, Georgia
Author_xml – sequence: 1
  givenname: Jaffar M.
  surname: Khan
  fullname: Khan, Jaffar M.
  organization: Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
– sequence: 2
  givenname: Vasilis C.
  surname: Babaliaros
  fullname: Babaliaros, Vasilis C.
  organization: Structural Heart and Valve Center, Emory University Hospital, Atlanta, Georgia
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  givenname: Adam B.
  surname: Greenbaum
  fullname: Greenbaum, Adam B.
  organization: Structural Heart and Valve Center, Emory University Hospital, Atlanta, Georgia
– sequence: 4
  givenname: Jason R.
  surname: Foerst
  fullname: Foerst, Jason R.
  organization: Carilion Roanoke Memorial Hospital, Roanoke, Virginia
– sequence: 5
  givenname: Shahram
  surname: Yazdani
  fullname: Yazdani, Shahram
  organization: Inova Fairfax Hospital, Fairfax, Virginia
– sequence: 6
  givenname: James M.
  surname: McCabe
  fullname: McCabe, James M.
  organization: University of Washington, Seattle, Washington
– sequence: 7
  givenname: Gaetano
  surname: Paone
  fullname: Paone, Gaetano
  organization: Center for Structural Heart Disease, Division of Cardiology, and Division of Cardiac Surgery, Henry Ford Health System, Detroit, Michigan
– sequence: 8
  givenname: Marvin H.
  surname: Eng
  fullname: Eng, Marvin H.
  organization: Center for Structural Heart Disease, Division of Cardiology, and Division of Cardiac Surgery, Henry Ford Health System, Detroit, Michigan
– sequence: 9
  givenname: Bradley G.
  surname: Leshnower
  fullname: Leshnower, Bradley G.
  organization: Structural Heart and Valve Center, Emory University Hospital, Atlanta, Georgia
– sequence: 10
  givenname: Patrick T.
  surname: Gleason
  fullname: Gleason, Patrick T.
  organization: Structural Heart and Valve Center, Emory University Hospital, Atlanta, Georgia
– sequence: 11
  givenname: Marcus Y.
  surname: Chen
  fullname: Chen, Marcus Y.
  organization: Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
– sequence: 12
  givenname: Dee Dee
  surname: Wang
  fullname: Wang, Dee Dee
  organization: Center for Structural Heart Disease, Division of Cardiology, and Division of Cardiac Surgery, Henry Ford Health System, Detroit, Michigan
– sequence: 13
  givenname: Xin
  surname: Tian
  fullname: Tian, Xin
  organization: Office of Biostatistics Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
– sequence: 14
  givenname: Annette M.
  surname: Stine
  fullname: Stine, Annette M.
  organization: Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
– sequence: 15
  givenname: Toby
  surname: Rogers
  fullname: Rogers, Toby
  organization: Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
– sequence: 16
  givenname: Robert J.
  surname: Lederman
  fullname: Lederman, Robert J.
  email: lederman@nih.gov
  organization: Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland
BackLink https://www.ncbi.nlm.nih.gov/pubmed/31118146$$D View this record in MEDLINE/PubMed
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IsDoiOpenAccess true
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Issue 20
Keywords mitral annular calcification
transcatheter mitral valve replacement
LAMPOON
TMVR
NHLBI
transseptal interventions
PVL
transcatheter electrosurgery
valve-in-ring
LVOT
structural heart disease
MAC
intentional laceration of the anterior mitral leaflet to prevent left ventricular outflow obstruction
left ventricular outflow tract
National Heart Lung and Blood Institute
paravalvular leak
Language English
License This article is made available under the Elsevier license.
Published by Elsevier Inc.
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content type line 14
ObjectType-Article-2
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content type line 23
Drs. Khan and Babaliaros contributed equally to this work.
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Snippet Left ventricular outflow tract (LVOT) obstruction is a leading cause of mortality and exclusion from transcatheter mitral valve replacement (TMVR). Intentional...
AbstractBackgroundLeft ventricular outflow tract (LVOT) obstruction is a leading cause of mortality and exclusion from transcatheter mitral valve replacement...
BackgroundLeft ventricular outflow tract (LVOT) obstruction is a leading cause of mortality and exclusion from transcatheter mitral valve replacement (TMVR)....
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SubjectTerms Aged
Aged, 80 and over
Alcohol
Calcification
Cardiac Catheterization - methods
Cardiology
Cardiovascular
Cardiovascular diseases
Catheters
Echocardiography
Echocardiography, Transesophageal
Electrosurgery - methods
Female
Follow-Up Studies
Heart
Heart Septum - diagnostic imaging
Heart Septum - surgery
Heart Valve Diseases - complications
Heart Valve Diseases - diagnosis
Heart Valve Diseases - surgery
Heart Valve Prosthesis Implantation - methods
Humans
Intraoperative Period
Laboratories
Male
Middle Aged
mitral annular calcification
Mitral valve
Mitral Valve - diagnostic imaging
Mitral Valve - surgery
Mortality
Prospective Studies
structural heart disease
Surgery
Survival
Tomography
Tomography, X-Ray Computed
transcatheter electrosurgery
transcatheter mitral valve replacement
transseptal interventions
Treatment Outcome
valve-in-ring
Ventricle
Ventricular Outflow Obstruction - diagnosis
Ventricular Outflow Obstruction - etiology
Ventricular Outflow Obstruction - prevention & control
Title Anterior Leaflet Laceration to Prevent Ventricular Outflow Tract Obstruction During Transcatheter Mitral Valve Replacement
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https://dx.doi.org/10.1016/j.jacc.2019.02.076
https://www.ncbi.nlm.nih.gov/pubmed/31118146
https://www.proquest.com/docview/2227796907
https://www.proquest.com/docview/2231851552
https://pubmed.ncbi.nlm.nih.gov/PMC6664295
Volume 73
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