METHODS
The Canberra Hospital (TCH) device registry is a prospectively maintained a cohort database of implanted cardiac devices. The demographic and clinical data is being recorded at scheduled clinic visits and the device data is being interrogated through scheduled or unscheduled clinic visits and remote monitoring of the devices. In this study, consecutive patients receiving an ICD between January 2005 to June 2019 who had regular interrogation (clinical or remote transmission) of the implanted ICD in the follow-up were included. The identity of these patients was linked with the National Death Index (NDI) obtained from the Australian Institute of Health and Welfare (AIHW) to confirm the survival status and cause of death. The following patients were excluded from the study: incomplete clinical or device data; no survival data; in-hospital or immediate post-procedure (<30 days) deaths; channelopathies.
The study complies with the Declaration of Helsinki and was approved by the Human Research Ethics Committee (2019/LRE/0127) and the AIHW Ethics Committee (EO2020/1/1102). The primary objective of the study was to analyse the characteristics of the demographic variables, clinical variables, device therapies and survival data of patients receiving an ICD in patients with mixed CMP in comparison with ICM and NICM. The secondary objectives were to analyse the characteristics of clinical, device therapies and mortality in non-survivors in the total cohort and to identify the significant predictors of mortality in the total cohort.