RESUMO
O acesso ao sistema venoso, seja para coleta de amostras de sangue ou para infusão de soluções, é de vital importância para o diagnóstico e tratamento de pacientes com as mais variadas condições clínicas. Desde que Harvey, em 1616, descreveu o sistema circulatório a partir de estudos em animais e que Sir Christopher Wren, 4 décadas depois, realizou a primeira infusão endovenosa em seres vivos, a evolução na técnica de acesso e nos dispositivos para infusão tem sido constante. Merece destaque a criação dos cateteres de longa duração na década de 1970, em especial os totalmente implantáveis, que revolucionaram o tratamento do câncer, aumentando a segurança e o conforto dos pacientes oncológicos. Este artigo tem como objetivo a revisão de dados históricos relativos ao acesso vascular e a discussão da técnica de implante e das principais complicações associadas ao procedimento de colocação e ao uso dos cateteres totalmente implantáveis
Access to the venous system is of vital importance for diagnosis and treatment of patients with the most varied range of clinical conditions, whether for taking blood samples or for infusion of solutions. In 1616, Harvey described the circulatory system on the basis of studies in animals and 4 decades later Sir Christopher Wren conducted the first intravenous infusions in living beings. Since then there has been constant evolution in access technique and infusion devices. Of particular note is the creation of long-term catheters in the 1970s, particularly totally implantable devices, which revolutionized cancer treatment, increasing both safety and comfort for oncology patients. The objectives of this article are to review historical data on vascular access and discuss the implantation technique and the main complications associated with procedures for placement and use of totally implantable venous access devices
Assuntos
Humanos , Masculino , Feminino , Vasos Sanguíneos/fisiologia , Cateteres Venosos Centrais , Próteses e Implantes/efeitos adversos , Próteses e Implantes/história , Dispositivos de Acesso Vascular/história , Catéteres , Veia Femoral/fisiologia , Infecções , Neoplasias/terapia , Ultrassonografia de Intervenção/métodos , Veias/fisiologia , Trombose Venosa/complicações , Trombose Venosa/terapiaRESUMO
Objective Analyse venous haemodynamics in healthy primigravidae during pregnancy and in the postpartum. Methods Cohort with primigravidae evaluated in the three trimesters of pregnancy and postpartum. Duplex evaluated venous diameters and reflux; air plethysmography evaluated venous filling index, ejection fraction, residual volume fraction and outflow fraction in both limbs. Results During pregnancy, diameters increased in bilateral common femoral and right infravalvar great saphenous, but returned to first trimester values after delivery. Reflux developed in one woman (5%) in the second trimester and in two more women (15%) in the third trimester. No reflux was detected in postpartum. Bilateral venous filling index was higher during pregnancy. Bilateral ejection fraction and residual volume fraction did not change. Bilateral outflow fraction increased progressively. The right limb outflow fraction in left lateral decubitus was similar. All changes returned to first trimester values after delivery. Conclusions Healthy primigravidae presented changes in lower limbs' veins during pregnancy: diameters in bilateral common femoral and infravalvar great saphenous veins increased; new reflux was developed in 15% of women, but there was no venous hypertension. Calf muscular pump function did not change. All changes returned to first trimester values after delivery.
Assuntos
Veia Femoral/fisiologia , Número de Gestações/fisiologia , Hemodinâmica/fisiologia , Período Pós-Parto/fisiologia , Gravidez/fisiologia , Veia Safena/fisiologia , Feminino , Humanos , Estudos Prospectivos , Adulto JovemRESUMO
The control of blood flow during exercise involves different mechanisms, one of which is the activation of the renin-angiotensin system, which contributes to exercise-induced blood flow redistribution. Moreover, although angiotensin II (Ang II) is considered a potent venoconstrictor agonist, little is known about its effects on the venous bed during exercise. Therefore, the present study aimed to assess the Ang II responses in the femoral vein taken from sedentary and trained rats at rest or subjected to a single bout of exercise immediately before organ bath experiments. Isolated preparations of femoral veins taken from resting-sedentary, exercised-sedentary, resting-trained and exercised-trained animals were studied in an organ bath. In parallel, the mRNA expression of prepro-endothelin-1 (ppET-1), as well as the ETA and ETB receptors, was quantified by real-time PCR in this tissue. The results show that, in the presence of L-NAME, Ang II responses in resting-sedentary animals were higher compared to the other groups. However, this difference disappeared after co-treatment with indomethacin, BQ-123 or BQ-788. Moreover, exercise reduced ppET-1 mRNA expression. These reductions in mRNA expression were more evident in resting-trained animals. In conclusion, either acute or repeated exercise adapts the rat femoral veins, thereby reducing the Ang II responses. This adaptation is masked by the action of locally produced nitric oxide and involves, at least partially, the ETB- mediated release of vasodilator prostanoids. Reductions in endothelin-1 production may also be involved in these exercise-induced modifications of Ang II responses in the femoral vein.
Assuntos
Angiotensina II/fisiologia , Veia Femoral/fisiologia , Adaptação Fisiológica , Angiotensina II/farmacologia , Animais , Anti-Hipertensivos/farmacologia , Relação Dose-Resposta a Droga , Endotelina-1/biossíntese , Endotelina-1/genética , Endotelina-1/fisiologia , Expressão Gênica , Técnicas In Vitro , Indometacina/farmacologia , Masculino , NG-Nitroarginina Metil Éster/farmacologia , Óxido Nítrico/fisiologia , Óxido Nítrico Sintase/antagonistas & inibidores , Oligopeptídeos/farmacologia , Peptídeos Cíclicos/farmacologia , Condicionamento Físico Animal , Esforço Físico , Piperidinas/farmacologia , Ratos , VasoconstriçãoRESUMO
PURPOSE: Quantify the volume and diameter of veins in the lower limbs of primigravidae and associate the presence of venous signs and symptoms with the vascular measurements. METHODS: A cross-sectional study assessed 64 lower limbs of 32 healthy women of whom 16 were primigravidae between 22 and 36 weeks pregnant, and 16 nulligravidae. The women were submitted to physical assessment, air plethysmography and vascular ultrasound. The volumes and diameters of the main veins in the lower limbs were compared between pregnant and non-pregnant women. In the group of pregnant women, the attempt was also made to associate such measurements to the presence of vascular signs and symptoms. RESULTS: The average venous volume of the lower limbs (110.1 ± 30.2 and 94.7 ± 27.3 mL; p = 0.036), as well as the diameters of the common femoral (12.72 ± 2.27 and 10.14 ± 1.24 mm; p < 0.0001), saphenous (4.81 ± 1.15 and 3.55 ± 0.98 mm; p < 0.0001) and popliteal (6.87 ± 1.68 and 5.36 ± 1.07 mm; p < 0.0001) veins were, respectively, greater in the pregnant women compared with the control group. In pregnant women with venous stasis symptoms, a venous diameter of the saphenous vein compared to those without no symptoms (5.05 ± 1.19 and 4.09 ± 0.70 mm; p = 0.011) was noted. CONCLUSIONS: Anatomical and functional changes in the venous system during pregnancy were detected by the air plethysmography and the vascular ultrasound in primigravidae. In pregnant women, the presence of venous stasis symptoms found an anatomical and functional substrate detected in the differences in diameter of the saphenous vein.
Assuntos
Extremidade Inferior/irrigação sanguínea , Síndrome Pós-Trombótica/patologia , Complicações Cardiovasculares na Gravidez/patologia , Veia Safena/patologia , Adolescente , Adulto , Estudos de Casos e Controles , Estudos Transversais , Feminino , Veia Femoral/anatomia & histologia , Veia Femoral/diagnóstico por imagem , Veia Femoral/fisiologia , Humanos , Extremidade Inferior/diagnóstico por imagem , Pessoa de Meia-Idade , Pletismografia , Veia Poplítea/anatomia & histologia , Veia Poplítea/diagnóstico por imagem , Veia Poplítea/fisiologia , Síndrome Pós-Trombótica/diagnóstico por imagem , Gravidez , Complicações Cardiovasculares na Gravidez/diagnóstico por imagem , Complicações Cardiovasculares na Gravidez/fisiopatologia , Veia Safena/diagnóstico por imagem , Veia Safena/fisiopatologia , Ultrassonografia , Adulto JovemRESUMO
To study whether treatment with L-arginine (ARG), a substrate of nitric oxide biosynthesis, attenuates intestinal dysfunction caused by ischemia (I) and reperfusion (R), rabbits treated with ARG (100 mgxkg(-1), intravenously) or saline solution (SS) prior to I (60 minutes) by occlusion of superior mesenteric artery and/or during R (120 minutes). After I or I/R, 2-cm jejunal segments were isolated and mounted in an organ bath to study of neurogenic contractions stimulated by electrical pulses or KCl using a digital recording system. Thin jejunal slices were stained (hematoxylin and eosin) for analysis by optical microscopy. Compared to the sham group, jejunal contractions were similar in I + ARG, but reduced in I + SS, I/R + SS, and I/R + ARG groups. The jejunal enteric nerves were damaged in I + SS, I/R + SS, and I/R + ARG, but not in I + ARG group, suggesting that ARG can attenuate intestinal dysfunctions due to I, but not to R.
Assuntos
Arginina/farmacologia , Intestinos/irrigação sanguínea , Óxido Nítrico/biossíntese , Traumatismo por Reperfusão/prevenção & controle , Animais , Arginina/uso terapêutico , Circulação Sanguínea , Veia Femoral/fisiologia , Motilidade Gastrointestinal/efeitos dos fármacos , Motilidade Gastrointestinal/fisiologia , Isquemia/fisiopatologia , Jejuno/irrigação sanguínea , Jejuno/efeitos dos fármacos , Jejuno/patologia , Artéria Mesentérica Superior/fisiologia , Coelhos , Reperfusão/efeitos adversos , Traumatismo por Reperfusão/fisiopatologiaRESUMO
To study if the treatment with adenosine (ADO), an agonist of adenosine receptors, attenuates intestinal dysfunction caused by ischemia (I) and reperfusion (R), we treated rabbits with ADO (15 mg x kg(-1), intravenously) or saline solution (SS) to I (60 minutes) before occlusion of superior mesenteric artery and/or R (120 min). After I or I/R, isolated jejunal segments (2 cm) were mounted in an organ bath to study nerve-mediated contractions stimulated by electrical pulses or KCl using a digital recording system. Thin jejunal slices were stained (hematoxylin and eosin) for analysis by optical microscopy. Compared to the sham group, the jejunal contractions were similar in I + ADO, but reduced in I + SS, I/R + SS, and I/R + ADO groups. We concluded that the jejunal enteric nerves were damaged in I + SS, I/R + SS, and I/R + ADO, but not in I + ADO group. These results suggested that ADO attenuated intestinal dysfunction due to I, but not to R.
Assuntos
Adenosina/farmacologia , Intestinos/irrigação sanguínea , Traumatismo por Reperfusão/tratamento farmacológico , Animais , Circulação Sanguínea , Estimulação Elétrica , Veia Femoral/efeitos dos fármacos , Veia Femoral/fisiologia , Jejuno/irrigação sanguínea , Jejuno/efeitos dos fármacos , Jejuno/fisiologia , Masculino , Artéria Mesentérica Superior/fisiologia , Contração Muscular/efeitos dos fármacos , Contração Muscular/fisiologia , Cloreto de Potássio/farmacologia , Agonistas do Receptor Purinérgico P1 , Coelhos , Cloreto de Sódio/farmacologiaRESUMO
OBJETIVO: É comum a obtenção de acesso venoso femoral em pacientes submetidos a cirurgia cardíaca em associação ou como alternativa ao acesso superior (veia jugular interna ou veia subclávia). O objetivo deste estudo foi comparar as medidas de pressão venosa central (PVC) em dois sítios diferentes (superior vs. femoral). MÉTODOS: Estudo prospectivo e aberto com 60 pacientes submetidos a cirurgia cardíaca no período de julho a novembro de 2006. Foram obtidas três medidas de cada paciente em cada sítio (admissão, 6 e 12 horas após a cirurgia) em duas inclinações diferentes da cabeceira do leito (zero e 30 graus), totalizando 720 medidas. RESULTADOS: Cinqüenta e cinco por cento dos pacientes foram submetidos a revascularização do miocárdio, 38 por cento a cirurgia valvar e 7 por cento a outras cirurgias. A média de PVC ± desvio padrão (DP) medida no acesso superior foi de 13,0 ± 5,5 mmHg (zero grau) e 13,3 ± 6,1 mmHg (30 graus), enquanto que as medidas no acesso inferior foram 11,1 ± 4,9 mmHg (zero grau) e 13,7 ± 4,6 mmHg (30 graus). A correlação linear (r) entre as medidas nos dois sítios foi de 0,66 (zero grau) e 0,53 (30 graus), ambas com p < 0,0001. CONCLUSÃO: A PVC pode ser medida com acurácia no acesso venoso femoral no pós-operatório imediato de cirurgia cardíaca, com melhor correlação linear obtida com as medidas feitas com a cabeceira do leito posicionada em zero grau.
OBJECTIVE: It is common to obtain femoral venous approach in patients undergoing combined heart surgery or as an alternative to superior approach (internal jugular vein or subclavian vein). The aim of this study was to compare the measures of central venous pressure (CVP) at two different sites (superior versus femoral). METHODS: We prospectively and openly allocated 60 patients who underwent heart surgery between July from November 2006. Three measures were obtained from each patient at each site (admission, 6 and 12 hours after surgery) in two different inclinations of the headboard (zero and 30 degrees) totaling 720 measures. RESULTS: Fifty five percent of patients who underwent coronary artery bypass grafting, 38 percent heart valve surgery and 7 percent other surgeries. The mean of CVP ± standard deviation (SD) measured in superior approach was 13.0 ± 5.5 mmHg (zero degree) and 13.3 ± 6.1 mmHg (30 degrees) while the measures in inferior approach were 11.1 ± 4.9 mmHg (zero degree) and 13.7 ± 4.6 mmHg (30 degrees). The linear correlation (r) between the measures in both sites was 0.66 (zero degree) and 0.53 (30 degrees), both with p value<0.0001. CONCLUSION: The CVP can be measured with accuracy in the femoral venous approach in the immediate postoperative period of heart surgery with better linear correlation obtained with the measures made with the headboard positioned at zero degree.
Assuntos
Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Procedimentos Cirúrgicos Cardíacos , Cateterismo Venoso Central/métodos , Pressão Venosa Central/fisiologia , Veia Femoral/fisiologia , Veias Jugulares/fisiologia , Veia Subclávia/fisiologia , Leitos , Métodos Epidemiológicos , Período Pós-Operatório , Postura , Cuidados Pré-Operatórios , Fatores de TempoRESUMO
BACKGROUND: The characterization of the dynamic process of veins walls is essential to understand venous functioning under normal and pathological conditions. However, little work has been done on dynamic venous properties. AIM: To characterize vein compliance (C), viscosity (eta), peak-strain (W St) and dissipated (W(D)) energy, damping (zeta), and their regional differences in order to evaluate their role in venous functioning during volume-pressure overloads. METHODS: In a mock circulation, pressure (P) and diameter (D) of different veins (anterior cava, jugular and femoral; from 7 sheep), were registered during cyclical volume-pressure pulses. From the P-D relationship, C, W(St) and zeta (at low and high P-D levels), eta and W(D) were calculated. RESULTS: For each vein there were P-dependent differences in biomechanical, energetics, and damping capability. There were regional-differences in C, eta), W(St) and W(D) (p<0.05), but not in zeta. CONCLUSION: The regional-dependent differences in dynamics and energetics, and regional-similitude in damping could be important to ensure venous functioning during acute overloads. The lower C and higher W(St) and W(D) found in back-limb veins (femoral), commonly submitted to high volume-pressure loads (i.e. during walking), could be considered relevant to ensure adequate venous system functionality and venous wall protection simultaneously.
Assuntos
Pressão Sanguínea/fisiologia , Volume Sanguíneo/fisiologia , Veia Femoral/fisiologia , Veias Jugulares/fisiologia , Veia Cava Inferior/fisiologia , Animais , Fenômenos Biomecânicos , Complacência (Medida de Distensibilidade) , Veia Femoral/anatomia & histologia , Veias Jugulares/anatomia & histologia , Ovinos , Veia Cava Inferior/anatomia & histologia , ViscosidadeRESUMO
OBJECTIVE: It is common to obtain femoral venous approach in patients undergoing combined heart surgery or as an alternative to superior approach (internal jugular vein or subclavian vein). The aim of this study was to compare the measures of central venous pressure (CVP) at two different sites (superior versus femoral). METHODS: We prospectively and openly allocated 60 patients who underwent heart surgery between July from November 2006. Three measures were obtained from each patient at each site (admission, 6 and 12 hours after surgery) in two different inclinations of the headboard (zero and 30 degrees) totaling 720 measures. RESULTS: Fifty five percent of patients who underwent coronary artery bypass grafting, 38% heart valve surgery and 7% other surgeries. The mean of CVP +/- standard deviation (SD) measured in superior approach was 13.0 +/- 5.5 mmHg (zero degree) and 13.3 +/- 6.1 mmHg (30 degrees) while the measures in inferior approach were 11.1 +/- 4.9 mmHg (zero degree) and 13.7 +/- 4.6 mmHg (30 degrees). The linear correlation (r) between the measures in both sites was 0.66 (zero degree) and 0.53 (30 degrees), both with p value<0.0001. CONCLUSION: The CVP can be measured with accuracy in the femoral venous approach in the immediate postoperative period of heart surgery with better linear correlation obtained with the measures made with the headboard positioned at zero degree.
Assuntos
Procedimentos Cirúrgicos Cardíacos , Cateterismo Venoso Central/métodos , Pressão Venosa Central/fisiologia , Veia Femoral/fisiologia , Veias Jugulares/fisiologia , Veia Subclávia/fisiologia , Leitos , Métodos Epidemiológicos , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Período Pós-Operatório , Postura , Cuidados Pré-Operatórios , Fatores de TempoRESUMO
Background: The characterization of the dynamic process of veins walls is essential to understand venous functioning under normal and pathological conditions. However, little work has been done on dynamic venous properties. Aim: To characterize vein compliance (C), viscosity (η), peak-strain (W St) and dissipated (W D) energy, damping (ξ), and their regional differences in order to evalúate their role in venous functioning during volume-pressure overloads. Methods: In a mock circulation, pressure (P) and diameter (D) of different veins (anterior cava, jugular and femoral; from 7 sheep), were registered during cyclical volume-pressure pulses. From the P-D relationship, C, W St and ξ (at low and high P-D leveis), η and W D were calculated. Resulls: For each vein there were P-dependent differences in biomechanical, energetics, and damping capability. There were regional-differences in C, η), W St and W D (p<0.05), but not in ξ. Conclusión: The regional-dependent differences in dynamics and energetics, and regional-similitude in damping could be important to ensure venous functioning during acute overloads. The lower C and higher W St and W D found in back-limb veins (femoral), commonly submitted to high volume-pressure loads (i.e. during walking), could be considered relevant to ensure adequate venous system functionality and venous wall protection simultaneously.
Assuntos
Animais , Pressão Sanguínea/fisiologia , Volume Sanguíneo/fisiologia , Veia Femoral/fisiologia , Veias Jugulares/fisiologia , Veia Cava Inferior/fisiologia , Fenômenos Biomecânicos , Complacência (Medida de Distensibilidade) , Veia Femoral/anatomia & histologia , Veias Jugulares/anatomia & histologia , Ovinos , Viscosidade , Veia Cava Inferior/anatomia & histologiaRESUMO
PURPOSE: The objective was to evaluate the impact of anastomosis diameter on blood flow in an arteriovenous fistula (AVF), comparing two different anastomosis sizes with a modified side-to-side technique in canine femoral arteries. METHODS: Ten mongrel dogs were subjected to two AVFs each, both using a modified side-to-side technique. On one side, the anastomosis diameter was 1.5 times the arterial diameter and on the other side 3.0 times the arterial diameter. Mean proximal and caudal blood flow and mean venous flow were measured using an electronic flowmeter 15, 20 and 25 min after surgery. The Mann-Whitney, Friedman and Wilcoxon non-parametric tests were used for data analysis (alpha < or = 0.05). RESULTS: Femoral artery flow cranial to the fistula became 5.6 times greater in the 1.5 arterial diameter group, and 8.4 times greater in the 3.0 arterial diameter group, when compared to initial arterial flow. The mean flow in the cranial vein was greater in the 3.0 group (10.09 times greater vs. 6.46 times greater in the 1.5 group). Both in the proximal artery and in the vein there was a significantly greater flow in the group with the larger anastomosis diameter (Wilcoxon test). In the femoral artery caudal to the fistula, the flow in most of the animals was reversed: 3.5 times greater in the 1.5 group and 1.2 times greater in the 3.0 group, without statistical difference. CONCLUSIONS: These results suggest that 3.0 times the arterial diameter for the AVF size in dogs leads to greater venous flow than with 1.5 times the arterial diameter, without increasing the reversed flow.
Assuntos
Anastomose Arteriovenosa/cirurgia , Derivação Arteriovenosa Cirúrgica/métodos , Artéria Femoral/cirurgia , Animais , Modelos Animais de Doenças , Cães , Artéria Femoral/fisiologia , Veia Femoral/fisiologia , Veia Femoral/cirurgia , Masculino , Fluxo Sanguíneo RegionalRESUMO
We hypothesized that reliance on lactate as a means of energy distribution is higher after a prolonged period of acclimatization (9 wk) than it is at sea level due to a higher lactate Ra and disposal from active skeletal muscle. To evaluate this hypothesis, six Danish lowlanders (25 +/- 2 yr) were studied at rest and during 20 min of bicycle exercise at 146 W at sea level (SL) and after 9 wk of acclimatization to 5,260 m (Alt). Whole body glucose Ra was similar at SL and Alt at rest and during exercise. Lactate Ra was also similar for the two conditions at rest; however, during exercise, lactate Ra was substantially lower at SL (65 micro mol. min(-1). kg body wt(-1)) than it was at Alt (150 micro mol. min(-1). kg body wt(-1)) at the same exercise intensity. During exercise, net lactate release was approximately 6-fold at Alt compared with SL, and related to this, tracer-calculated leg lactate uptake and release were both 3- or 4-fold higher at Alt compared with SL. The contribution of the two legs to glucose disposal was similar at SL and Alt; however, the contribution of the two legs to lactate Ra was significantly lower at rest and during exercise at SL (27 and 81%) than it was at Alt (45 and 123%). In conclusion, at rest and during exercise at the same absolute workload, CHO and blood glucose utilization were similar at SL and at Alt. Leg net lactate release was severalfold higher, and the contribution of leg lactate release to whole body lactate Ra was higher at Alt compared with SL. During exercise, the relative contribution of lactate oxidation to whole body CHO oxidation was substantially higher at Alt compared with SL as a result of increased uptake and subsequent oxidation of lactate by the active skeletal muscles.
Assuntos
Aclimatação/fisiologia , Altitude , Metabolismo dos Carboidratos , Ácido Láctico/metabolismo , Esforço Físico/fisiologia , Adulto , Glicemia/metabolismo , Bolívia , Dióxido de Carbono/análise , Dióxido de Carbono/metabolismo , Isótopos de Carbono , Dinamarca , Deutério , Teste de Esforço , Feminino , Artéria Femoral/fisiologia , Veia Femoral/fisiologia , Glucose/metabolismo , Glucose/farmacocinética , Humanos , Ácido Láctico/farmacocinética , Perna (Membro) , Masculino , Músculo Esquelético/irrigação sanguínea , Músculo Esquelético/metabolismo , Oxirredução , Troca Gasosa PulmonarRESUMO
The aim of this study was to evaluate the blood flow of an arteriovenous fistula comparing the modified latero-lateral (LLM) and end-lateral (TL) techniques in canine femoral arteries. Ten mongrel dogs were submitted to 2 arteriovenous fistulae each, with a LLM on one side and a TL procedure on the other side. Cranial and caudal average blood flow as well as average venous flow were measured by an electronic fluxometer 15, 20, and 25 min after surgery. Mann-Whitney, Friedman, and Wilcoxon nonparametric tests were used for data analysis (alpha
Assuntos
Derivação Arteriovenosa Cirúrgica/métodos , Artéria Femoral/cirurgia , Veia Femoral/cirurgia , Anastomose Cirúrgica/métodos , Animais , Pressão Sanguínea/fisiologia , Cães , Fenômenos Eletromagnéticos/instrumentação , Eletrônica Médica/instrumentação , Artéria Femoral/fisiologia , Veia Femoral/fisiologia , Frequência Cardíaca/fisiologia , Hemorreologia , Masculino , Fluxo Sanguíneo Regional/fisiologia , Reologia/instrumentação , Estatísticas não Paramétricas , TransdutoresRESUMO
La taquicardia auricular es una causa de taquicardia paroxística supraventricular que puede originarse en relación a un circuito de reentrada intraauricular o por la existencia de uno o múltiples focos de automatismo anormal. Esta última forma de taquicardia se denomina como taquicardia auricular ectópica (TAE) y se caracteriza porque suele ser resistente a tratamiento antirrítmico y porque en caso de tener carácter incesante puede llevar a insuficiencia cardíaca. En los últimos años se han desarrollado diversas alternativas de tratamiento no farmacológico. En la presente publicación presentamos el caso clínico de una mujer con TAE derecha que fue fulgurada con radiofrecuencia en forma exitosa