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1. El límite Dogger-Malm en la Cordillera Ibérica: anomalías geoquímicas y fenómenos asociados

Author

Meléndez Hevia, Guillermo, Sequeijos, L., Brochwicz Lewinski, W., Gasiewicz, A., Suffzynsky, Szatkowski, K., Zbik, M., and Tarkowski, R.

Subjects
Iberian Chain, Rare events, Dogger/Malm boundary, Extintions, Jurassic
Abstract

The hypothesis put forward by Raup and Sepkoski, linking major mass extintions with cyclic cosmic catastrophes, focussed attention on several geological boundaries. This was also the case of the Middle/Upper Jurassic boundary in Poland and Spain (Iberian Chain). Some «rare events» have been detected: possible submarine corrosion processes, Iranomaly and high enrichment in heavy metals (Fe, Mn, Ni, Co, Ra and Pt), cosmic dust, etc., La hipótesis planteada por Raup y Sepkoski, que relacionan las mayores extinciones en masa con las catástrofes cósmicas cíclicas, centran su atención en muchos límites geológicos. Este fue también el caso del límite Medio/Alto Jurásico con Polonia y España (Sistema Ibérico). Se han detectado algunos «eventos raros»: posibles procesos de corrosión submarina, anomalía y gran enriquecimiento de materiales pesados (Fe, Mn, Ni, Co, Ra y Pt), polvo cósmico, etc.

Published
1987

3. [Transcatheter closure of atrial septal defects in adults with the Amplatzer atrial septal occluder].

Author

Białkowski J, Szkutnik M, Wilczek K, Chodór B, Zeifert B, Sikora J, Szatkowski K, Haponiuk I, and Zembala M

Subjects
Adolescent, Adult, Female, Humans, Male, Middle Aged, Embolization, Therapeutic methods, Heart Septal Defects, Atrial therapy
Abstract

Unlabelled: In many centres the Amplatzer Septal Occluder (ASO) (AGA Med. Corp. Minnesota, USA) has become the device of choice for secundum atrial septal defect (ASD) closure in children. Current trend towards transcatheter closure of ASD in children could be translated to adults and many patients (pts) may avoid the need of open heart surgery. Assessment the efficacy and complication of device occlusion of ASD in adults, using ASO. Between October 1997 and April 2001 transcatheter closure of ASD was attempted in 51 pts who fulfilled the inclusion criteria--significant shunt with sufficient rims of interatrial septum. Mean age of pts was 29 (16-63) y, mean ASD diameter assessed by transesophageal echocardiography (TEE) was 14.7 (7-24) mm, assessed during catheterization by balloon sizing (stretched diameter) was 20.2 (8-36) mm. There were 9 pts with multiple ASDs, 2 pts with aneurysm of interatrial septum and 2--after previous surgery (recanalization of ASD). The ASO devices were successfully implanted in all, but one pt. In one patient because of unstable position of ASO (floppy rims), device was removed and bigger one was applied during next session. In one case early embolization to abdominal aorta occurred, ASO was translocated to aortic arch with Dotter basket and removed from aorta during simultaneous surgical closure of ASD. Mean fluoroscopy time was 15 (4-50) min. The occlusion rate after 24 h was 90%, after 1 month (m) 92%, after 3 m 93.5%, after 1 year (y) 93.3% and after 2 y 93.3%. All residual shunts were trivial. There were no late complication., Conclusions: The excellent results of ASD closure with ASO in adults indicate this treatment as a method of choice in selected patients, but long term follow-up is necessary to state final judgement.

Published
2001

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