RESUMO
A 5-day-old neonate presented in shock, with signs and symptoms of severe coarctation of the aorta. He was diagnosed with a patent aortic arch, and a completely thrombosed abdominal aorta. The authors report the successful transcatheter removal of the entire thrombus using the AngioJet(®) Thrombectomy system. This represents the first published use of the AngioJet(®) catheter in the aorta of a pediatric patient.
Assuntos
Aorta Abdominal , Coartação Aórtica/diagnóstico , Doenças da Aorta/terapia , Cateterismo Periférico/instrumentação , Trombectomia/instrumentação , Trombose/terapia , Dispositivos de Acesso Vascular , Aorta Abdominal/diagnóstico por imagem , Coartação Aórtica/diagnóstico por imagem , Doenças da Aorta/diagnóstico por imagem , Aortografia , Diagnóstico Diferencial , Desenho de Equipamento , Humanos , Recém-Nascido , Masculino , Valor Preditivo dos Testes , Radiografia Intervencionista , Trombectomia/métodos , Trombose/diagnóstico por imagem , Resultado do TratamentoRESUMO
The relationship between ventilatory (VT) and lactate threshold (LT) in 8 boys (11.1 +/- 0.7 yrs) and 9 men (24.0 +/- 3.3 yrs) with similar peak VO(2) levels was assessed. Percent peak VO(2) at VT and LT were higher (P < 0.05) in the boys (67.9 +/- 2.6% and 63.9 +/- 5.0%, respectively) compared with men (59.0 +/- 3.2% and 54.8 +/- 2.7%, respectively). VO(2) (mL.kg(-1).min(-1)) at VT was higher (P < 0.05) and at LT tended to be higher in boys. Correlations between VT and LT were r = 0.95 for VO(2) (mL.kg(-1).min(-1)) and r = 0.82 for % peak VO(2) (P < 0.05) in boys and r = 0.87 (P < 0.05) and r = 0.60 (P > 0.05), respectively, in men. The mechanisms mediating VT and LT in children are not established fully and warrant further study.
Assuntos
Limiar Anaeróbio , Exercício Físico/fisiologia , Lactatos/sangue , Consumo de Oxigênio , Ventilação Pulmonar/fisiologia , Adolescente , Adulto , Fatores Etários , Criança , Teste de Esforço , Humanos , Masculino , Resistência Física , Aptidão Física/fisiologia , Estudos Prospectivos , Troca Gasosa PulmonarRESUMO
PURPOSE: To examine the changes in heart rate (HR) after two different submaximal exercise bouts in boys and girls. METHODS: Eleven boys (10.5 +/- 1.0 yr) and 10 girls (10.8 +/- 0.7 yr) participated in this study. Each child completed an initial graded exercise test to determine peak VO2. On subsequent and separate days, a 5-min submaximal exercise bout on a cycle ergometer was performed. One bout was conducted at 70 W, and the other bout corresponded to an intensity of 85-90% of peak VO2. VO2 and HR were measured during and after (1 min and 3 min). HR recovery responses from each submaximal exercise bout were analyzed using a group by time ANOVA, and Pearson-product correlations were determined between resting HR, peak VO2, and postexercise HR responses. RESULTS: HR in the boys was lower at the end of exercise and the first minute of recovery versus girls but not at the 3rd min of recovery. There were no differences in HR recovery after the relative exercise bout. Resting HR was significantly correlated with postexercise HR from both bouts (r = 0.52-0.69), whereas peak VO2 did not correlate to postexercise HR. ANCOVA using resting HR as the covariate eliminated the gender different noted with the recovery from the 70-W bout. CONCLUSIONS: In summary, postexercise HR responses differed between boys and girls when submaximal exercise was performed at an absolute work rate. When exercise was performed at a relative intensity, HR recovery responses were similar between the two groups. Resting HR appears to account for variations in postexercise HR better than peak VO2.