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2015 ; 10
(7
): e0131570
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
ICD Shock, Not Ventricular Fibrillation, Causes Elevation of High Sensitive
Troponin T after Defibrillation Threshold Testing--The Prospective, Randomized,
Multicentre TropShock-Trial
#MMPMID26208329
Semmler V
; Biermann J
; Haller B
; Jilek C
; Sarafoff N
; Lennerz C
; Vrazic H
; Zrenner B
; Asbach S
; Kolb C
PLoS One
2015[]; 10
(7
): e0131570
PMID26208329
show ga
BACKGROUND: The placement of an implantable cardioverter defibrillator (ICD) has
become routine practice to protect high risk patients from sudden cardiac death.
However, implantation-related myocardial micro-damage and its relation to
different implantation strategies are poorly characterized. METHODS: A total of
194 ICD recipients (64±12 years, 83% male, 95% primary prevention of sudden
cardiac death, 35% cardiac resynchronization therapy) were randomly assigned to
one of three implantation strategies: (1) ICD implantation without any
defibrillation threshold (DFT) testing, (2) estimation of the DFT without
arrhythmia induction (modified "upper limit of vulnerability (ULV) testing") or
(3) traditional safety margin testing including ventricular arrhythmia induction.
High-sensitive Troponin T (hsTnT) levels were determined prior to the
implantation and 6 hours after. RESULTS: All three groups showed a postoperative
increase of hsTnT. The mean delta was 0.031±0.032 ng/ml for patients without DFT
testing, 0.080±0.067 ng/ml for the modified ULV-testing and 0.064±0.056 ng/ml for
patients with traditional safety margin testing. Delta hsTnT was significantly
larger in both of the groups with intraoperative ICD testing compared to the
non-testing strategy (p?0.001 each). There was no statistical difference in delta
hsTnT between the two groups with intraoperative ICD testing (p = 0.179).
CONCLUSION: High-sensitive Troponin T release during ICD implantation is
significantly higher in patients with intraoperative ICD testing using shock
applications compared to those without testing. Shock applications, with or
without arrhythmia induction, did not result in a significantly different delta
hsTnT. Hence, the ICD shock itself and not ventricular fibrillation seems to
cause myocardial micro-damage. TRIAL REGISTRATION: ClinicalTrials.gov
NCT01230086.
|*Defibrillators, Implantable
[MESH]
|Aged
[MESH]
|Analysis of Variance
[MESH]
|Arrhythmias, Cardiac/blood/physiopathology/prevention & control
[MESH]
|Biomarkers/blood
[MESH]
|Cardiac Resynchronization Therapy/methods
[MESH]
|Creatine Kinase, MB Form/blood
[MESH]
|Death, Sudden, Cardiac/prevention & control
[MESH]