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. 2023 Mar 28;13(4):589.
doi: 10.3390/jpm13040589.

Relationship between Exercise Test Parameters, Device-Delivered Electric Shock and Adverse Clinical Events in Patients with an Implantable Cardioverter Defibrillator for Primary Prevention

Guillaume Théry  1   2 , Laurent Faroux  1 , Fanny Boyer  1 , Pierre Nazeyrollas  1 , Jean-Pierre Chabert  1 , Damien Metz  1 , François Lesaffre  1
Affiliations

Relationship between Exercise Test Parameters, Device-Delivered Electric Shock and Adverse Clinical Events in Patients with an Implantable Cardioverter Defibrillator for Primary Prevention

Guillaume Théry et al. J Pers Med. .

Abstract

(1) Background: Receiving the first internal electric shock is a turning point for patients with an implantable cardioverter defibrillator (ICD) for primary prevention. However, no study has investigated whether patients who receive a first device-delivered electric shock have a poor prognosis even at the time of ICD implantation. (2) Methods: We retrospectively identified 55 patients with ischemic (n = 31) or dilated (n = 24) cardiomyopathy who underwent ICD implantation for primary prevention with exercise test at the time of implantation. We recorded baseline characteristics, exercise test parameters, and clinical events. (3) Results: After a median follow-up of 5 years, we observed an association between an appropriate device-delivered electric shock, the occurrence of death or heart transplant, and the occurrence of the composite endpoint. There was also a significant relation between a VE/VCO2 slope >35 and the occurrence of the composite endpoint. Conversely, there was no significant association between negative outcomes on the exercise test and the occurrence of a device-delivered electric shock. (4) Conclusions: The exercise test performed at the time of ICD implantation do not predict the occurrence of device-delivered electric shock. The exercise test and the first electric shock are two independent markers of poor prognosis.

Keywords: exercise test; heart failure; implantable cardioverter defibrillator; oxygen uptake.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Occurrence of the composite endpoint according to VE/VCO2 slope.
Figure 2
Figure 2
Occurrence of the composite endpoint according to appropriate device-delivered electric shock.
See this image and copyright information in PMC

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