Implantación electiva de stent recubierto en la coartación y recoartación en el joven y en el adulto / Elective implantation of covered stents for coarctation and recoarctation in adolescents and adults

Introducción y objetivos. El stent es un tratamiento eficaz en la coartación y la recoartación. Sin embargo, en jóvenes y adultos pueden ocurrir rotura de pared y disección de aorta y, en el seguimiento, aneurismas. Con el fin de reducir estas complicaciones, implantamos el stent recubierto mayoritariamente de manera electiva. Métodos. Desde 2005 realizamos el procedimiento en 17 pacientes (2 adolescentes y 15 adultos) acceso femoral, 16 de manera electiva y en 1 como rescate. Seguimos técnica de Mullins con implantación de stent recubierto de NuMED®. Resultados. Buena aposición del stent en 17 casos, con acampanamiento distal en 8. Reducción del gradiente de 40±16 a 2±2mmHg (p<0,001) y aumento del diámetro de luz de 4±2 a 19±3mm (p<0,001). Se comentan dos casos excepcionales: uno con rotura que se trató de rescate con stent en el stent, y otro con obstrucción total y aneurisma intercostal que presentó una evolución fatal, pues murió a las 48 h del procedimiento (se muestra la necropsia). El seguimiento clínico fue de 4 años, con estudio con ecocardiograma Doppler, y en 13 de los pacientes con otra técnica de imagen, todos ellos con buena evolución. Conclusiones. El stent recubierto es un tratamiento eficaz en la coartación y la recoartación del joven y el adulto, de elección en los casos con anatomía compleja, y es necesario como dispositivo de rescate en los casos de stent no recubierto (AU)

Introduction and objectives. Stent implantation is an effective therapy for aortic coarctation and recoarctation. However, in adolescents and adults, aortic wall rupture and dissection can occur, as well as aneurysms during follow-up. In order to reduce these complications, we electively implant covered stents. Methods. Since 2005, we have performed the procedure using femoral access in 17 patients (2 adolescents and 15 adults), 16 electively and 1 as a rescue procedure. We used the Mullins technique in all cases, implanting a NuMED® covered stent. Results. Good stent apposition was achieved in all 17 procedures; 8 patients required a distal flare. Gradient was reduced from 40 (16) mmHg to 2 (2) mmHg (P<.001) and lumen diameter increased from 4 (2) mm to 19 (3) mm (P<.001). Two exceptional cases are discussed: one patient with aortic wall rupture who underwent a rescue procedure using a stent within a covered stent and another patient with total obstruction and intercostal aneurysm in whom the outcome was fatal at 48 h postprocedure (autopsy is shown). Four-year clinical follow-up included Doppler echocardiography; an additional imaging technique was required in 13 patients. All patients recovered well and there were no complications. Conclusions. Covered stents are effective in treating coarctation and recoarctation in adolescents and adults, are the treatment of choice in patients with complex anatomy, and must be available in the operating room as a rescue device when implanting a conventional stent (AU)

Elective implantation of covered stents for coarctation and recoarctation in adolescents and adults.

INTRODUCTION AND OBJECTIVES: Stent implantation is an effective therapy for aortic coarctation and recoarctation. However, in adolescents and adults, aortic wall rupture and dissection can occur, as well as aneurysms during follow-up. In order to reduce these complications, we electively implant covered stents. METHODS: Since 2005, we have performed the procedure using femoral access in 17 patients (2 adolescents and 15 adults), 16 electively and 1 as a rescue procedure. We used the Mullins technique in all cases, implanting a NuMED(®) covered stent. RESULTS: Good stent apposition was achieved in all 17 procedures; 8 patients required a distal flare. Gradient was reduced from 40 (16) mmHg to 2 (2) mmHg (P<.001) and lumen diameter increased from 4 (2) mm to 19 (3) mm (P<.001). Two exceptional cases are discussed: one patient with aortic wall rupture who underwent a rescue procedure using a stent within a covered stent and another patient with total obstruction and intercostal aneurysm in whom the outcome was fatal at 48 h postprocedure (autopsy is shown). Four-year clinical follow-up included Doppler echocardiography; an additional imaging technique was required in 13 patients. All patients recovered well and there were no complications. CONCLUSIONS: Covered stents are effective in treating coarctation and recoarctation in adolescents and adults, are the treatment of choice in patients with complex anatomy, and must be available in the operating room as a rescue device when implanting a conventional stent.

Embolia pulmonar múltiple tras vertebroplastia con polimetilmetacrilato, con evolución fatal a pesar de la extracción percutánea de un microfragmento / Multiple fatal pulmonary embolism during polymethyl-methacrylate vertebroplasty with successful percutaneous retrieval of a large cement fragment

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[Pulmonary atresia with intact ventricular septum. Perforation and pulmonary valvuloplasty using a modified mechanical technique. Medium-term follow-up]. / Atresia pulmonar con septo íntegro. Perforación y valvuloplastia pulmonar mediante técnica mecánica modificada. Seguimiento a medio plazo.

INTRODUCTION AND OBJECTIVES: In patients with pulmonary atresia with intact ventricular septum (PAIVS), radiofrequency-assisted perforation of the valve is the most widely used initial therapy when the anatomy is favorable. We report our experience with a modified mechanical technique that gave good results. METHODS: Between November 2001 and October 2006, valve opening was carried out successfully in 11 consecutive neonates with a favorable anatomy (i.e., Alwi groups A and B, and tricuspid valve Z-score -1.1 [1.3]). The technique involved snare-assisted anterograde or retrograde perforation with the soft tip of a special guidewire used for chronic total coronary artery occlusions, use of an arteriovenous loop, and progressive balloon dilatation from a diameter of 2 mm to a maximum diameter of 9.6 [1.2] mm. RESULTS: Valve opening was achieved in all patients, and right ventricular (RV) systolic pressure fell from 97 [17] mmHg to 48 [13] mmHg (P< .001). No pericardial effusion or cardiac tamponade was observed, though one neonate died 24 hours after the procedure due to pulmonary embolism. Six patients (54%) were discharged without any further intervention, while 4 (36%) required an additional increase in pulmonary blood flow. During the follow-up period of 25 [21] months, two patients died. Eight (72%) survived and were in New York Heart Association functional class 1. Two required additional surgery on the outflow tract, one of whom also needed a one-and-a-half ventricular repair. Data indicate that the valves remain open as RV structures grow, though without any change in the tricuspid valve Z-score. CONCLUSIONS: Pulmonary valvuloplasty using a mechanical technique proved effective in patients with PAIVS. Modification of the standard mechanical technique by using the soft tip of a special guidewire used for chronic total coronary artery occlusions was less aggressive and improved results. In patients with a favorable anatomy, results were comparable to those obtained using the radiofrequency technique.

Atresia pulmonar con septo íntegro. Perforación y valvuloplastia pulmonar mediante técnica mecánica modificada. Seguimiento a medio plazo / Pulmonary atresia with intact ventricular septum. Perforation and pulmonary valvuloplasty using a modified mechanical technique. Medium-term follow-up

Introducción y objetivos. En la atresia pulmonar con septo íntegro, si la anatomía es favorable, el tratamiento inicial más extendido es la apertura valvular mediante radiofrecuencia. Presentamos nuestra experiencia mediante una técnica mecánica modificada con buenos resultados. Métodos. Entre noviembre de 2001 y octubre de 2006 realizamos apertura valvular en 11 casos consecutivos con anatomía favorable (grupo A y B de Alwi e índice z tricúspide de ­1,1 ± 1,3), mediante perforación anterógrada guiada por lazo o retrógrada mediante guías especiales para la obstrucción crónica total coronaria por su parte blanda y circuito arteriovenoso y dilatación progresiva con balón monorraíl coronario desde 2 mm de diámetro hasta un máximo de 9,6 ± 1,2 mm. Resultados. Se realizó la apertura valvular en todos los casos con reducción de la presión sistólica del ventrículo derecho de 97 ± 17 a 48 ± 13 mmHg (p < 0,001). No se observaron derrame ni taponamiento en ningún caso, y un neonato falleció a las 24 h por un tromboembolismo pulmonar. Seis casos (54%) fueron dados de alta sin otro procedimiento, y 4 (36%) precisaron un flujo pulmonar adicional. El seguimiento fue de 25 ± 21 meses. Dos pacientes fallecieron, mientras que 8 (72%) sobrevivieron y se encontraban en situación funcional I. Dos precisaron cirugía adicional del tracto de salida y en uno de ellos, además, del ventrículo y medio. Persisten datos de desobstrucción valvular con crecimiento de estructuras en el ventrículo derecho, aunque sin cambios en el índice z valvular. Conclusiones. La valvuloplastia pulmonar con técnica mecánica sigue siendo válida en la atresia pulmonar con septo íntegro. La modificación de la técnica mecánica clásica mediante guías especiales para la obstrucción crónica total coronaria por su parte blanda es menos agresiva y mejora sus resultados. En esta serie con anatomía favorable los resultados son superponibles a los obtenidos mediante radiofrecuencia (AU)

Introduction and objectives. In patients with pulmonary atresia with intact ventricular septum (PAIVS), radiofrequency-assisted perforation of the valve is the most widely used initial therapy when the anatomy is favorable. We report our experience with a modified mechanical technique that gave good results. Methods. Between November 2001 and October 2006, valve opening was carried out successfully in 11 consecutive neonates with a favorable anatomy (i.e., Alwi groups A and B, and tricuspid valve Z-score ­1.1 [1.3]). The technique involved snare-assisted anterograde or retrograde perforation with the soft tip of a special guidewire used for chronic total coronary artery occlusions, use of an arteriovenous loop, and progressive balloon dilatation from a diameter of 2 mm to a maximum diameter of 9.6 [1.2] mm. Results. Valve opening was achieved in all patients, and right ventricular (RV) systolic pressure fell from 97 [17] mmHg to 48 [13] mmHg (P<.001). No pericardial effusion or cardiac tamponade was observed, though one neonate died 24 hours after the procedure due to pulmonary embolism. Six patients (54%) were discharged without any further intervention, while 4 (36%) required an additional increase in pulmonary blood flow. During the follow-up period of 25 [21] months, two patients died. Eight (72%) survived and were in New York Heart Association functional class 1. Two required additional surgery on the outflow tract, one of whom also needed a one-and-a-half ventricular repair. Data indicate that the valves remain open as RV structures grow, though without any change in the tricuspid valve Z-score. Conclusions. Pulmonary valvuloplasty using a mechanical technique proved effective in patients with PAIVS. Modification of the standard mechanical technique by using the soft tip of a special guidewire used for chronic total coronary artery occlusions was less aggressive and improved results. In patients with a favorable anatomy, results were comparable to those obtained using the radiofrequency technique (AU)

[Guided transcatheter valvulotomy in pulmonary atresia with intact ventricular septum]. / Valvulotomía mecánica percutánea dirigida en la atresia pulmonar con septo íntegro.

Transcatheter valvulotomy in pulmonary atresia with an intact ventricular septum can be used as a first step to create biventricular circulation and to stimulate further development of the hypoplastic right ventricle. We describe our experience in a case of a neonate with this congenital cardiac defect who underwent successful transcatheter perforation of the atretic pulmonary valve. This report highlights the utility of a special technique based on the use of a gooseneck snare positioned just above the atretic valve to guide the advance of a coronary guidewire. Other therapeutic alternatives are considered.

Valvulotomía mecánica percutánea dirigida en la atresia pulmonar con septo íntegro / Guided transcatheter valvulotomy in pulmonary atresia with intact ventricular septum

La valvulotomía percutánea con catéter en la atresia pulmonar con septo íntegro puede ser el primer paso para establecer una circulación en serie con el posterior desarrollo del ventrículo derecho. Presentamos nuestra experiencia en un neonato con esta cardiopatía, al que realizamos una apertura mecánica, haciendo especial referencia a la técnica empleada con guía especial para desobstrucción coronaria y dirigida con catéter-lazo abierto sobre la válvula pulmonar atrésica. Se exponen otras técnicas alternativas y se discute la evolución de esta paciente en función de su desarrollo anatómico (AU)