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1.
Heart Rhythm O2 ; 5(1): 34-40, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38312199

RESUMEN

Background: Long-term rhythm monitoring to detect atrial fibrillation (AF) following a cryptogenic stroke (CS) is well established. However, the burden of organized atrial arrhythmias in this population is not well defined. Objective: The purpose of this study was to assess the incidence and risk factors for organized atrial arrhythmias in patients with CS. Methods: We evaluated all patients with CS who received an insertable cardiac monitor (ICM) between October 2014 and April 2020. All ICM transmissions categorized as AF, tachycardia, or bradycardia were reviewed. We evaluated the time to detection of organized AF and the combination of either organized atrial arrhythmia or AF. Results: A total of 195 CS patients with ICMs were included (51% men; mean age 66 ± 12 years; mean CHA2DS2-VASC score 4.6). Over mean follow-up of 18.9 ± 11.2 months, organized atrial arrhythmias lasting ≥30 seconds were detected in 45 patients (23%), of whom 62% did not have AF. Seventeen patients had both organized atrial arrhythmia and AF, and another 21 patients had AF only. Compared to those with normal left atrial size, patients with left atrial enlargement had a higher adjusted risk for development of atrial arrhythmias (mild left atrial enlargement: hazard ratio 1.99; 95% confidence interval 1.06-3.75; moderate/severe left atrial enlargement: hazard ratio 3.06; 95% confidence interval 1.58-5.92). Conclusion: Organized atrial arrhythmias lasting ≥30 seconds are detected in nearly one-fourth of CS patients. Two-thirds of these patients did not have AF. Further studies are required to evaluate the impact of organized atrial arrhythmias on recurrent stroke risk.

2.
Heart Rhythm ; 16(6): 873-878, 2019 06.
Artículo en Inglés | MEDLINE | ID: mdl-30590192

RESUMEN

BACKGROUND: The presence of inferior vena cava filters (IVCFs) has been considered a relative contraindication to electrophysiology (EP) procedures that require transfemoral venous placement of multiple catheters and/or long sheaths. There are inadequate data related to complex EP procedures in this population. OBJECTIVE: The purpose of this study was to describe the experience of a single high-volume center with respect to complex EP procedures in patients with IVCFs. METHODS: Patients with IVCFs undergoing complex EP procedures between 2004 and 2018 were identified. Clinical characteristics, IVCF type, procedural findings, and complications were analyzed. RESULTS: Fifty complex ablation procedures were performed in 40 patients (mean age 63.8 ± 10.9 years; 68% men). The mean IVCF dwell time was 69.1 ± 19.1 months, and 48 patients (96%) were on chronic oral anticoagulation. Procedures included ablation of atrial fibrillation (n = 21), ventricular tachycardia (n = 20), supraventricular tachycardia (n = 3), cavotricuspid isthmus flutter (n = 3), supraventricular tachycardia and cavotricuspid isthmus flutter (n = 1), and transvenous lead extraction (n = 3). Twenty procedures included quadripolar catheters (mean 1.4 ± 0.75), and 33 procedures involved deflectable decapolar catheters (mean 1.7 ± 0.47). Long sheaths were used in 35 cases (mean 1.63 ± 0.49) and intracardiac echocardiography in 38. In 4 cases (involving 3 patients), the IVCF was occluded and could not be crossed. There were no procedural complications related to the IVCF. CONCLUSION: The substantial majority of IVCFs in patients presenting for complex EP procedures were patent and easily crossed under fluoroscopic guidance. The presence of an IVCF should not discourage operators from performing procedures that require transfemoral deployment of multiple catheters and/or sheaths.


Asunto(s)
Arritmias Cardíacas/cirugía , Cateterismo Cardíaco , Cateterismo Periférico , Vena Femoral , Filtros de Vena Cava , Trombosis de la Vena , Anticoagulantes/uso terapéutico , Arritmias Cardíacas/clasificación , Cateterismo Cardíaco/efectos adversos , Cateterismo Cardíaco/instrumentación , Cateterismo Cardíaco/métodos , Ablación por Catéter/métodos , Cateterismo Periférico/efectos adversos , Cateterismo Periférico/instrumentación , Cateterismo Periférico/métodos , Catéteres , Remoción de Dispositivos/métodos , Técnicas Electrofisiológicas Cardíacas/métodos , Estudios de Factibilidad , Femenino , Vena Femoral/diagnóstico por imagen , Vena Femoral/cirugía , Humanos , Masculino , Persona de Mediana Edad , Evaluación de Procesos y Resultados en Atención de Salud , Cirugía Asistida por Computador/métodos , Trombosis de la Vena/tratamiento farmacológico , Trombosis de la Vena/cirugía
4.
Arch Intern Med ; 171(6): 577-84, 2011 Mar 28.
Artículo en Inglés | MEDLINE | ID: mdl-21444849

RESUMEN

BACKGROUND: Clinical practice guidelines (CPGs) serve as standards of care in practice, quality improvement, and reimbursement. The extent of conflicts of interest (COIs) in cardiology guideline production has not been well studied. Herein, we describe the scope of COIs in CPGs. METHODS: We examined the 17 most recent American College of Cardiology/American Heart Association guidelines through 2008. Using disclosure lists, we cataloged COIs for each participant as receiving a research grant, being on a speaker's bureau and/or receiving honoraria, owning stock, or being a consultant or member of an advisory board. We also cataloged the companies and institutions reported in each disclosure. "Episode" describes 1 instance of participation in 1 guideline by 1 person. "Individual" describes 1 person who may be involved in multiple episodes. "Company" describes a commercial or industry affiliation reported by an individual in a single episode. Analysis involved descriptive statistics and correlation analyses (Pearson correlation coefficient, χ(2) and R(2)). RESULTS: Fifty-six percent of the 498 individuals reported a COI, corresponding to 56% of the 651 episodes. Being a consultant or member of an advisory board was the most common type. The percentage of episodes involving a COI varied between guidelines (range, 13%-87%). The number of episodes per individual was associated with both presence and number of disclosures (P < .001 for both comparisons). Of 478 companies, the number per guideline ranged from 2 to 242 companies (mean, 38 companies). One company was the most frequently reported company in 7 of 17 guidelines. CONCLUSION: Conflicts of interest are prevalent in cardiology guidelines, but there seems to be a significant number of experienced experts without COIs.


Asunto(s)
Cardiología , Conflicto de Intereses , Guías de Práctica Clínica como Asunto , Humanos , Mejoramiento de la Calidad , Estados Unidos
5.
Virology ; 374(2): 453-67, 2008 May 10.
Artículo en Inglés | MEDLINE | ID: mdl-18280530

RESUMEN

Human Adenovirus Type 4 (HAdV-4) is responsible for epidemic outbreaks of Acute Respiratory Disease (especially in military recruits), and is known to cause significant morbidity with several reported cases of mortality. However, we do not understand why this serotype causes such high morbidity, and have little insight into the immunobiology of HAdV-4 infections. We have now developed a replication attenuated HAdV-4 vector system, and through it, demonstrate that HAdV-4 virions have enhanced infectivity of certain cell types and reveal aspects of the serotype-specific heightened innate immunogenicity of infectious HAdV-4 capsids both in vitro and in vivo. We further found that elements of this serotype-specific immunogenicity were dependent upon interactions with the complement system. These findings provide insights into the mechanisms possibly underlying the known morbidity accompanying wild-type HAdV-4 infections as well as highlight important considerations when considering development of alternative serotype vectors.


Asunto(s)
Adenovirus Humanos/inmunología , Cápside , Proteínas del Sistema Complemento/metabolismo , Vectores Genéticos , Inmunidad Innata , Adenovirus Humanos/clasificación , Adenovirus Humanos/genética , Adenovirus Humanos/fisiología , Cápside/inmunología , Cápside/metabolismo , Proteínas de la Cápside/inmunología , Proteínas de la Cápside/metabolismo , Línea Celular , Células Cultivadas , Células Dendríticas/virología , Células Epiteliales/virología , Humanos , Plásmidos/genética , Serotipificación , Virión/metabolismo , Replicación Viral
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