survival following vad complications: implications for transplant priority. todd dardas, md, ms may...
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Survival following VAD Survival following VAD complications: implications for complications: implications for
transplant priority.transplant priority.
Todd Dardas, MD, MSTodd Dardas, MD, MS
May 16, 2015May 16, 2015
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DisclosuresDisclosures
• Funding: Funding: – American College of Cardiology/Sankyo American College of Cardiology/Sankyo
Daiichi Career Development GrantDaiichi Career Development Grant
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Candidate survivalCandidate survival
Wever-Pinzon, O, et. al.; Circulation 2012
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Dardas T, et al J Am Coll Cardiol 2012
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Status 1A exceptionsStatus 1A exceptions
Meyer D, et. al. American Journal of Transplantation 2015; 15: 44–54
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UNOS 1A(b) justificationsUNOS 1A(b) justifications
Unpublished data, UNOS registry
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Tier ProposalsTier Proposals1.1. MCS with arrhythmiasMCS with arrhythmias, non-dischargeable , non-dischargeable
VADVAD
2.2. Device malfunctionDevice malfunction, IABP , IABP
3.3. MCS (infection, thromboembolism, other MCS (infection, thromboembolism, other complications), LVAD 30 days, dual complications), LVAD 30 days, dual inotropes inotropes
4.4. Inotrope w/o HD monitor, stable VADInotrope w/o HD monitor, stable VAD
5.5. Multi-organ transplantsMulti-organ transplants
6.6. Remaining candidatesRemaining candidates
Meyer D, et. al. American Journal of Transplantation 2015; 15: 44–54
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Guidance from OPTNGuidance from OPTN
1.1. Aortic insufficiencyAortic insufficiency2.2. HemolysisHemolysis3.3. Pump thrombosisPump thrombosis4.4. Pump-related local or systemic infectionPump-related local or systemic infection5.5. BleedingBleeding6.6. Right heart failureRight heart failure7.7. Recrudescent arrhythmiasRecrudescent arrhythmias8.8. Device malfunctionDevice malfunction
Meyer D, et. al. American Journal of Transplantation 2015; 15: 44–54
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OPTN infection guidanceOPTN infection guidancePump-related or systemic infection with one of:Pump-related or systemic infection with one of:•Symptoms along driveline with leukocytosis AND:Symptoms along driveline with leukocytosis AND:
+ blood culture or+ blood culture or
+ site culture+ site culture•Surgical debridement of the driveline AND + site Surgical debridement of the driveline AND + site cultureculture•+ Pump pocket culture+ Pump pocket culture•Bacteremia with the same organism 4 weeks Bacteremia with the same organism 4 weeks following treatmentfollowing treatment
Meyer D, et. al. American Journal of Transplantation 2015; 15: 44–54; http://www.uab.edu/medicine/intermacs/appendices-4-0/appendix-a-4-0
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Research aimsResearch aims
• Determine mortality for complications Determine mortality for complications following CF VAD placement and compare following CF VAD placement and compare to non-MCS UNOS candidates.to non-MCS UNOS candidates.
• Evaluate whether subgroups within Evaluate whether subgroups within complications have distinct risks useful for complications have distinct risks useful for ranking in the tier system.ranking in the tier system.
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MethodsMethods• INTERMACS data for all primary implants of CF INTERMACS data for all primary implants of CF
devices implanted between 4/2012 and 3/2014devices implanted between 4/2012 and 3/2014
• DT and BTT included unless otherwise specifiedDT and BTT included unless otherwise specified
• Complications:Complications:– Multiple complications per time pointMultiple complications per time point– First and isolated complicationFirst and isolated complication– First infection of any number reportedFirst infection of any number reported
• OPTN/UNOS registry data for patients without OPTN/UNOS registry data for patients without MCSMCS
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SampleSample
Complications/ interval
Strategy
Other BTT BTE DT Total
0 5 151 186 299 641
1 162 2,607 4,320 6,011 13,100
2 53 808 1,385 2,052 4,298
3 12 118 207 342 679
4 1 24 44 87 156
5 1 9 9 17 36
6 0 1 4 3 8
7 0 0 4 0 4
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OutcomeOutcome
• Death during VAD supportDeath during VAD support
• Censoring at transplant or recoveryCensoring at transplant or recovery
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SampleSample
• 4725 primary CF VAD implants4725 primary CF VAD implants
• 22,524 complications22,524 complications
• 2975 1st and isolated complications2975 1st and isolated complications
• No AE report n=641No AE report n=641
• Final cohort: n= 3616Final cohort: n= 3616
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Mortality following first complicationMortality following first complication
N = 3616
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Kirklin J et. al., J Heart Lung Transplant 2013
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INTERMACS AEsINTERMACS AEs
Hemolysis
Respiratory Failure
Right Heart Failure
Venous Thromboembolism
Device Malfunction
Wound Dehiscence
Major Bleeding
Arterial Non-CNS embolism
Major Infection
Other SAE
Neurological Dysfunction
Hepatic Dysfunction
Cardiac Arrhythmias
Hypertension
Pericardial Fluid Collection
Myocardial Infarction
Psychiatric Episode
Renal Dysfunction
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Mortality following first AE reportedMortality following first AE reportedAdverse Event
Cumulative hazard at 90 days following report
Std. err.
Renal Dysfunction 0.46 0.09 Neurological Dysfunction 0.45 0.10 Respiratory Failure 0.21 0.04 Device Malfunction 0.21 0.10 Right Heart Failure 0.17 0.04 Bleeding 0.15 0.02 Pericardial Drainage 0.12 0.05 Infection 0.12 0.02 Other SAE 0.10 0.02 Venous Thromboemb. 0.08 0.06 Hemolysis 0.07 0.05 Cardiac Arrhythmia 0.07 0.01 Psychiatric Episode 0.05 0.03
Status 1A
Status 1B
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11stst Infection AE Infection AE
N= 4632
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Adjusting for initial device strategyAdjusting for initial device strategy
Variables Hazard ratio P-value
AE infection 3.1 <0.0001
DT Ref
BTT 0.58 <0.0001
BTE 0.67 <0.0001
Other strategy 0.97 0.92
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Comparison to OPTN StatusComparison to OPTN Status
Status 1A
Status 1B
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Infection DefinitionInfection DefinitionOPTNOPTN
One of:One of:•Symptoms along driveline Symptoms along driveline with leukocytosis AND:with leukocytosis AND:
• + blood culture+ blood culture• + site culture+ site culture
•Surgical debridement AND Surgical debridement AND + site culture+ site culture•+ pump pocket culture+ pump pocket culture•Bacteremia 4 wks s/p Bacteremia 4 wks s/p treatmenttreatment
INTERMACSINTERMACS
•Localized non-deviceLocalized non-device
•Driveline or pump pocketDriveline or pump pocket
•SepsisSepsis
•Internal pump componentInternal pump component
Meyer D, et. al. American Journal of Transplantation 2015; 15: 44–54; http://www.uab.edu/medicine/intermacs/appendices-4-0/appendix-a-4-0
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INTERMACS subgroupsINTERMACS subgroups
All p-values <0.01 vs. No infection AE
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Adjusted for initial device strategyAdjusted for initial device strategy
Variable Hazard ratio P-value
Infection AE
No Inf. AE reported Ref
Localized, non-VAD 3.2 <0.0001
Perc. lead/pocket 1.9 <0.0001
Device component 8.5 0.003
Sepsis 3.8 <0.0001
Strategy
DT Ref
BTT 0.58 <0.0001
BTE 0.68 <0.0001
Other 0.95 0.86
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INTERMACS AEs & OPTN statusINTERMACS AEs & OPTN status
Status 1A
Status 1B
Driveline vs. No inf. AE p=0.13All other p-values <0.01
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Tier ProposalsTier Proposals1.1. MCS with arrhythmiasMCS with arrhythmias, non-dischargeable , non-dischargeable
VADVAD
2.2. MCS sepsis OR pump pocket/internal device MCS sepsis OR pump pocket/internal device infection OR localized infectioninfection OR localized infection, IABP , IABP
3.3. MCS driveline infectionMCS driveline infection, thromboembolism, , thromboembolism, LVAD 30 days, dual inotropes LVAD 30 days, dual inotropes
4.4. Inotrope w/o HD monitor, stable VADInotrope w/o HD monitor, stable VADMeyer D, et. al. American Journal of Transplantation 2015; 15: 44–54
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ConsiderationsConsiderations
• How should continued eligibility be How should continued eligibility be weighted in priority decisions?weighted in priority decisions?
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Changing device strategyChanging device strategy
Teuteberg J, et. al. J Am Coll Cardiol HF 2013
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BTT vs DT: 90-day mortalityBTT vs DT: 90-day mortalityAE type BTT DT DT - BTT
Bleeding 0.12 0.18 0.06
Cardiac Arrhythmia 0.01 0.12 0.11
Infection 0.14 0.12 -0.02
Neurological Dysfunction 0.22 0.59 0.37
Other SAE 0.02 0.16 0.13
Psychiatric Episode 0.07 0.00 -0.07
Renal Dysfunction 0.24 0.55 0.30
Respiratory Failure 0.23 0.28 0.05
Right Heart Failure 0.08 0.23 0.15
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ConsiderationsConsiderations
• How many subgroups should be identified How many subgroups should be identified and analyzed?and analyzed?
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Stratified complications?Stratified complications?
YesYes• InfectionsInfections• Right heart Right heart
failurefailure• BleedingBleeding• HemolysisHemolysis
NoNo• Device Device
malfunctionmalfunction
MaybeMaybe• Ventricular Ventricular
arrhythmiasarrhythmias• ThrombosisThrombosis• Aortic regurg.Aortic regurg.
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ConclusionsConclusions
Subgroups of patients within broad Subgroups of patients within broad complication types may warrant further complication types may warrant further characterization and stratification by characterization and stratification by INTERMACS definitionsINTERMACS definitions
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• Susan MeyerSusan Meyer
• Frank PaganiFrank Pagani
• Kent ShivelyKent Shively
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Mortality following first AE reportedMortality following first AE reportedAdverse Event
Cumulative hazard at 90 days following report
Std. err. At risk Deaths
Renal Dysfunction 0.46 0.09 53 30 Neurological Dysfunction 0.45 0.10 56 24 Respiratory Failure 0.21 0.04 95 22 Device Malfunction 0.21 0.10 38 5 Right Heart Failure 0.17 0.04 170 29 Bleeding 0.15 0.02 367 55 Pericardial Drainage 0.12 0.05 46 6 Infection 0.12 0.02 238 25 Other SAE 0.10 0.02 224 22 Venous Thromboemb. 0.08 0.06 23 2 Hemolysis 0.07 0.05 33 2 Cardiac Arrhythmia 0.07 0.01 291 22 Psychiatric Episode 0.05 0.03 41 2
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Risk of first AE relative to Risk of first AE relative to Status 1A/B Status 1A/B
Status 1A
Status 1B