Assessing Inequities in Cervical Cancer Quality of Care and Survival Related to Ethnicity and Socioeconomic Factors.

OBJECTIVE: This study aimed to assess the effect that race and socioeconomic factors have on the provision of care to cervical cancer patients based on National Comprehensive Cancer Network (NCCN) recommended treatment guidelines. MATERIALS AND METHODS: To do this, we completed a retrospective cohort study using the American College of Surgeon's Nation Cancer Database from 2004 to 2016. We identified all reported cases of cervical cancer in that period. Two cohorts were created using self-reported racial demographic data, Hispanic- and White, non-Hispanic-identified patients. Our primary outcome variables were adherence to NCCN-recommended treatment and 5-year overall survival. Adherence to NCCN-recommended treatment was determined by the provision of surgical and/or radiation and/or chemotherapy treatment based on the clinical stage at time of diagnosis and the presence or absence of lymphovascular space invasion. We used bivariate analyses to compare baseline characteristics between the 2 cohorts, multivariable logistic regression to identify independent predictors of 5-year survival, and Cox proportional hazards models to compute survival by group. RESULTS: The difference in NCCN-adherent care between the 2 cohorts was found to be not statistically significant (p = .880). A log rank (Mantel-Cox) χ2 test showed that there was a statistically significant difference between the 2 groups in overall survival with the Hispanic-identified patients living longer (p < .001). Our study is limited by the effect large databases confer on finding statistical significance. CONCLUSIONS: Hispanic-identified women with cervical cancer receive NCCN-compliant care and live longer than their White, non-Hispanic counterparts.

Repolarization abnormalities unmasked with exercise in sudden cardiac death survivors with structurally normal hearts.

BACKGROUND: Models of cardiac arrhythmogenesis predict that nonuniformity in repolarization and/or depolarization promotes ventricular fibrillation and is modulated by autonomic tone, but this is difficult to evaluate in patients. We hypothesize that such spatial heterogeneities would be detected by noninvasive ECG imaging (ECGi) in sudden cardiac death (SCD) survivors with structurally normal hearts under physiological stress. METHODS: ECGi was applied to 11 SCD survivors, 10 low-risk Brugada syndrome patients (BrS), and 10 controls undergoing exercise treadmill testing. ECGi provides whole heart activation maps and >1,200 unipolar electrograms over the ventricular surface from which global dispersion of activation recovery interval (ARI) and regional delay in conduction were determined. These were used as surrogates for spatial heterogeneities in repolarization and depolarization. Surface ECG markers of dispersion (QT and Tpeak-end intervals) were also calculated for all patients for comparison. RESULTS: Following exertion, the SCD group demonstrated the largest increase in ARI dispersion compared to BrS and control groups (13 ± 8 ms vs. 4 ± 7 ms vs. 4 ± 5 ms; P = 0.009), with baseline dispersion being similar in all groups. In comparison, surface ECG markers of dispersion of repolarization were unable to discriminate between the groups at baseline or following exertion. Spatial heterogeneities in conduction were also present following exercise but were not significantly different between SCD survivors and the other groups. CONCLUSION: Increased dispersion of repolarization is apparent during physiological stress in SCD survivors and is detectable with ECGi but not with standard ECG parameters. The electrophysiological substrate revealed by ECGi could be the basis of alternative risk-stratification techniques.

The ectopy-triggering ganglionated plexuses in atrial fibrillation.

BACKGROUND: Epicardial ganglionated plexuses (GP) have an important role in the pathogenesis of atrial fibrillation (AF). The relationship between anatomical, histological and functional effects of GP is not well known. We previously described atrioventricular (AV) dissociating GP (AVD-GP) locations. In this study, we hypothesised that ectopy triggering GP (ET-GP) are upstream triggers of atrial ectopy/AF and have different anatomical distribution to AVD-GP. OBJECTIVES: We mapped and characterised ET-GP to understand their neural mechanism in AF and anatomical distribution in the left atrium (LA). METHODS: 26 patients with paroxysmal AF were recruited. All were paced in the LA with an ablation catheter. High frequency stimulation (HFS) was synchronised to each paced stimulus for delivery within the local atrial refractory period. HFS responses were tagged onto CARTO™ 3D LA geometry. All geometries were transformed onto one reference LA shell. A probability distribution atlas of ET-GP was created. This identified high/low ET-GP probability regions. RESULTS: 2302 sites were tested with HFS, identifying 579 (25%) ET-GP. 464 ET-GP were characterised, where 74 (16%) triggered ≥30s AF/AT. Median 97 (IQR 55) sites were tested, identifying 19 (20%) ET-GP per patient. >30% of ET-GP were in the roof, mid-anterior wall, around all PV ostia except in the right inferior PV (RIPV) in the posterior wall. CONCLUSION: ET-GP can be identified by endocardial stimulation and their anatomical distribution, in contrast to AVD-GP, would be more likely to be affected by wide antral circumferential ablation. This may contribute to AF ablation outcomes.