The link between insurance and blood pressure control in U.S. stroke survivors.

BACKGROUND: After a stroke, poorly controlled blood pressure (BP) is associated with a higher risk of recurrent vascular events. Despite the importance of controlling BP to avert recurrent vascular events, fewer than half of stroke survivors in the United States achieve BP control. It is unclear to what extent insurance status affects BP levels after stroke. METHODS: We assessed BP control among adults with a history of stroke who participated in the National Health and Nutrition Examination Surveys from 1999 through 2016. The relationship between insurance type and BP level (low normal: <120/80 mmHg and normal: <140/90 mmHg) were evaluated using logistic regression before and after adjusting for sociodemographic characteristics and medical comorbidities for those <65 years and ≥ 65 years. RESULTS: Among 1646 adult stroke survivors (weighted n = 5,586,417), 30% had BP in the low normal range while 64% had BP in the normal range. Among 613 stroke survivors <65 years (weighted n = 2,396,980), only those with other government insurance (CHAMPVA, CHAMPUS/TRICARE) had better BP control than the uninsured (adjusted HR 2.68, 95% CI 0.99-7.25). Among 1033 participants ≥65 years (weighted n = 3,189,437), those with private insurance plus Medicare trended toward better normal BP compared to Medicare alone (adjusted HR 1.34, 95% CI 0.94-1.90). CONCLUSIONS: Only stroke survivors with CHAMPVA, CHAMPUS/TRICARE government insurance in the United States have lower odds of controlled BP compared to no insurance among those <65 years. Insurance alone does not improve BP control among stroke survivors.

Race, Ethnic, Sex, and Socioeconomic Inequities in Interhospital Transfer for Acute Ischemic Stroke in the United States.

BACKGROUND: Patients with stroke in the United States can be transferred for higher level of care. Little is known about possible inequities in interhospital transfers (IHTs) for acute ischemic stroke. We hypothesized that historically marginalized populations would have lower odds of IHT. METHODS: A cross-sectional analysis was done for adults with a primary diagnosis of acute ischemic stroke in 2010 to 2017; n=747 982 were identified in the National Inpatient Sample. Yearly rates for IHT were assessed and adjusted odds ratios (aORs) of IHT in 2014 to 2017 were compared with that of 2010 to 2013. Multinomial logistic regression was used to determine the aOR of IHT, adjusting for sociodemographic variables (model 1), sociodemographic and medical variables such as comorbidity and mortality risk (model 2), and sociodemographic, medical, and hospital variables (model 3). RESULTS: After adjusting for sociodemographic, medical, and hospital characteristics, there were no significant temporal differences in IHT from 2010 to 2017. Overall, women were less likely than men to be transferred in all models (model 3: aOR, 0.89 [0.86-0.92]). Compared with those who were White, individuals who were Black (aOR, 0.93 [0.88-0.99]), Hispanic (aOR, 0.90 [0.83-0.97]), other (aOR, 0.90 [0.82-0.99]), or of unknown race, ethnicity (aOR, 0.89 [0.80-1.00]) were less likely to be transferred (model 2), but these differences dissipated when further adjusting for hospital-level characteristics (model 3). Compared with those with private insurance, those with Medicaid (aOR, 0.86 [0.80-0.91]), self-pay (aOR, 0.64 [0.59-0.70]), and no charge (aOR, 0.64 [0.46-0.88]) were less likely to be transferred (model 3). Individuals with lower income were less likely to be transferred compared with those with higher income (model 3: aOR, 0.85 [0.80-0.90], third versus fourth quartile). CONCLUSIONS: Adjusted odds of IHT for acute ischemic stroke remained stable from 2010 to 2017. There are numerous inequities in the rates of IHT by race, ethnicity, sex, insurance, and income. Further studies are needed to understand these inequities and develop policies and interventions to mitigate them.

Association Between Hyperacute Blood Pressure Variability and Hematoma Expansion After Intracerebral Hemorrhage: Secondary Analysis of the FAST-MAG Database.

BACKGROUND: Blood pressure variability (BPV) has emerged as a significant factor associated with clinical outcomes after intracerebral hemorrhage (ICH). Although hematoma expansion (HE) is associated with clinical outcomes, the relationship between BPV that encompasses prehospital data and HE is unknown. We hypothesized that BPV was positively associated with HE. METHODS: We analyzed 268 patients with primary ICH enrolled in the National Institutes of Health-funded Field Administration of Stroke Therapy-Magnesium (FAST-MAG) study who received head computed tomography or magnetic resonance imaging on arrival to the emergency department (ED) and repeat imaging within 6-48 h. BPV was calculated by standard deviation (SD) and coefficient of variation (CV) from prehospital data as well as systolic blood pressure (SBP) measurements taken on ED arrival, 15 min post antihypertensive infusion start, 1 h post maintenance infusion start, and 4 h after ED arrival. HE was defined by hematoma volume expansion increase > 6 mL or by 33%. Univariate logistic regression was used for presence of HE in quintiles of SD and CV of SBP for demographics and clinical characteristics. RESULTS: Of the 268 patients analyzed from the FAST-MAG study, 116 (43%) had HE. Proportions of patients with HE were not statistically significant in the higher quintiles of the SD and CV of SBP for either the hyperacute or the acute period. Presence of HE was significantly more common in patients on anticoagulation. CONCLUSIONS: Higher BPV was not found to be associated with occurrence of HE in the hyperacute or the acute period of spontaneous ICH. Further study is needed to determine the relationship.

Treatment of vagus nerve stimulator-induced sleep-disordered breathing: A case series.

OBJECTIVE: Vagus nerve stimulation (VNS) is a treatment option for patients with drug-resistant seizures, but it is also associated with sleep-disordered breathing (SDB). We present four patients with VNS who underwent polysomnography (PSG) concurrently with VNS stimulation monitoring and adjustment, and positive airway pressure (PAP) treatment. We demonstrate the importance of sleep apnea screening prior to VNS placement and the dilemma of optimizing VNS settings. BACKGROUND: VNS is a common adjunct therapy for refractory epilepsy. Despite its low side effect profile, complications of VNS include delayed arrhythmias, laryngopharyngeal dysfunction, obstructive sleep apnea, and tonsillar pain mimicking glossopharyngeal neuralgia. Risk of developing or exacerbating existing obstructive sleep apnea (OSA) limits the VNS settings, as there appears to be a dose dependent effect. OSA can further cause sleep fragmentation and cause hypoxia, potentially worsening seizures. METHODS: Four patients with drug-resistant epilepsy with VNS underwent PSG with concurrent VNS leads to monitor correlation of SDB and VNS. AHI was calculated to quantify SDB, and it was scored as non-VNS related when the VNS was off, and VNS-induced when the onset of SDB corresponded to VNS activation. Subsequent PAP and VNS adjustment was performed to treat the SDB episodes. RESULTS: Three out of four patients had non-VNS associated SDB, which improved with PAP treatment. All four patients had VNS-induced SDB episodes but none improved with PAP. The VNS-induced SDB events decreased in a dose dependent manner, when VNS was adjusted down and disappeared when turned off completely. CONCLUSION: Our case series provides further evidence of VNS-induced SDB secondary to VNS. PAP treatment alone is ineffective for VNS-induced SDB. Screening for OSA before VNS implant is crucial; further research is needed to establish optimal VNS parameters for prevention andminimization of VNS-induced SDB along with other possible treatments.