Spanish Pacemaker Registry. 15th Official Report of the Spanish Society of Cardiology Working Group on Cardiac Pacing (2017)

Sex Differences and Long-Term Outcome in Patients With Pacemakers

Introduction: Evidence of sex-related differences in patients with pacemakers regarding comorbidities is insufficiently investigated. The aim of this study was to determine the relationship of cardiovascular comorbidities and sex category with properties of pacemaker implantation, pacemaker follow-up, and long-term survival.

Methods: This retrospective, single-center cohort study consisted of 6,362 pacemaker-patients (39.7% female) enrolled between May 2000 and April 2015. Functional pacemaker parameters were registered at regular pacemaker controls. Survival status and cause of death were analyzed in relation to comorbidities, implanted pacing devices, and echocardiography. Survival analyses were plotted for a 10-year follow-up.

Results: Patients with hypertension or hyperlipidemia had higher rates of implantations due to sick sinus syndrome (28.6 vs. 25.5% without hypertension, P < 0.001; 30.7 vs. 25.7% without hyperlipidemia, P < 0.001), while endocarditis was associated with higher rates of implantations due to AV block (46.7 vs. 33.4%, P < 0.001). Patients with valvular heart disease had higher rates of pacemaker implantation due to bradycardic atrial fibrillation (24.9 vs. 21.0% without valvular heart disease, P < 0.001). Ventricular pacing threshold increased in both sexes during the follow-up and was higher in women in the final follow-up (0.94 vs. 0.91 V in men, P = 0.002). During the 10-years follow-up, 6.1% of women and 8.6% of men underwent lead replacement (P = 0.054). Device and lead replacement rates were increased if the comorbidities coronary artery disease, heart failure, hypertension, hyperlipidemia, valvular heart disease, previous stroke/TIA, atrial arrhythmias, chronic kidney disease, or endocarditis were present. Diabetes and previous CABG increase the rates of device replacement, but not the rate of lead replacement. Severe tricuspid regurgitation after implantation of pacemaker was present in more men than women (14.4 vs. 6.1%, P < 0.001). In a multivariate COX regression, the following variables were associated with independent decrease of 10-year survival: hypertension (HR 1.34, 95% CI 1.09–1.64), chronic kidney disease (HR 1.83, 95% CI 1.53–2.19), tricuspid regurgitation after pacemaker implantation (HR 1.48, 95% CI 1.26–1.74). Survival was independently increased in female sex (HR 0.83, 95% CI 0.70–0.99) and hyperlipidemia (HR 0.81, 95% CI 0.67–0.97).

Conclusions: Cardiovascular comorbidities influenced significantly pacemaker implantations and long-term outcome.

Trial Registration:ClinicalTrials.gov Unique identifier: NCT03388281.

Long-Term Socioeconomic Impact of Informal Care Provided to Patients with Pacemakers: Remote vs. Conventional Monitoring

The impact of informal care immediately after pacemaker (PM) implantation has been well established; however, not much is known about its long-term effects. The present study compared personal characteristics, associated problems, workloads, time, and costs related to informal care provided to patients with PM under remote monitoring (RM) vs. conventional monitoring (CM) in the hospital, five years after implantation. The PONIENTE study was a controlled, non-randomized or masked clinical trial conducted with information obtained from the perspective of informal caregivers. Data were collected at 12 and 60 months after PM implantation. The patients in the study were assigned to two different groups: remote monitoring (RM) and conventional monitoring (CM). The “Disability, personal autonomy, and dependency situations survey” (EDAD) was administered to collect information on sociodemographic characteristics, time, care difficulties, health status, professional aspects, and impact on economic, family, or leisure aspects of the main caregivers providing care to patients with pacemakers. After five years, 55 patients completed the study (RM = 21; CM = 34). The average age was 63.14 years (SD = 14.90), 96% of them were women, and the most predominant marital status was married (72%). Informal caregivers lived in the homes of the patients in 70% of cases, and 88% indicated that they had to provide care six to seven days a week. The average cost per patient during the monitoring period studied was 13.17% lower in the RM group than in the CM group, and these differences were not statistically significant (p = 0.35). This study found similar results in the two groups under study with respect to sociodemographic characteristics, workload, time, and problems associated with health, leisure and family members. The costs associated with care were higher in the CM group; however, these differences were not statistically significant.