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P Fazekas

Publications and source records attributed to P Fazekas.

17 recordsLinked to original sources
PubMed2000

Pressure induced quantum critical point and non-fermi-liquid behavior in BaVS3

The phase diagram of BaVS3 is studied under pressure using resistivity measurements. The temperature of the metal to nonmagnetic Mott insulator transition decreases under pressure, and vanishes at the quantum critical point p(cr) = 20 kbar. We find two kinds of anomalous conducting states. The high-pressure metallic phase is a non-Fermi liquid described by Deltarho approximately T(n) where n = 1.2-1.3 at 1<T<40 K. At p<p(cr), the transition is preceded by a wide precursor region with critically increasing resistivity which we ascribe to the opening of a soft Coulomb gap.

Journal Article↗
PubMed1993

[The place of percutaneous transluminal angioplasty in the management of obliterative vascular diseases of the lower extremities. Femoro-popliteal arterial angioplasty].

Authors treated 331 patients having symptoms of femoropopliteal stenoses or occlusions with transluminal angioplasty from 1983. They performed 186 dilatations and 189 recanalizations. Procedures were preceded by medicinal preparation. The primary technical success rate was 94.6% after dilatation, and 79.9% after recanalisation. In case of stenosis the success rate did not show significant connection with the length of the dilated segment but in case of occlusion longer than 6 cm the success rate decreased. After procedure 87.2% of the patients became asymptomatic, or improved. 21 (5.6%) complications (7 inguinal hematomas, 6 emboles, 6 thromboses, one perforation of arterial wall) occurred and twelve of them required surgical intervention. One patient died after angioplasty due to cardiac failure. Authors are of the opinion that femoropopliteal occlusions and stenoses shorter than 6 cm should be treated by angioplasty. They suggest making balloon catheter dilatation for multiple stenoses even they are longer than 6 cm.

Aged↗
PubMed1992

[Pseudoaneurysm in a pancreatic pseudocyst].

Four cases with pseudoaneurysm developed on the basis of pancreatic pseudocyst are reported. Regarding data obtained from literature diagnostic and therapeutic possibilities and their success rates are analysed. Authors summarize both specific and non-specific signs of the pancreatic pseudoaneurysm obtained from duplex scan. All of their patients were successfully treated by operation. They call attention to the benefit of the selective feeding artery ligature. Importance of ultrasound follow up of patients suffering from pancreatitis is pointed out, as a prevention of the massive hemorrhage which is the most serious complication of the pancreatic pseudoaneurysm.

Alcoholism↗
PubMed1992

[The place of percutaneous transluminal angioplasty in the treatment of obliterative vascular diseases of the lower limbs. Angioplasty of of the iliac system].

Between 1983-91 386 patients with hemodinamically significant stenosis or short-segment occlusion of iliac arteries were treated by transluminal angioplasty. 487 dilatations and 13 recanalizations were performed. In 353 (70.2%) of these cases were carried out without medicinal preparation continuously after the diagnostic angiography. The technical success rate was 93.4%. The technical success rate did not depend on medicinal preparation. 93% of their patients became symptomless or improved. 28 complications were noted (7 thrombosis, 4 embolisms, 14 inguinal haematomas, 2 false aneurysms, 1 bleeding), 11 of them required surgical intervention. One patient died because of cardiac failure due to retroperitoneal haematoma. Authors' opinion isolated short uni- and bilateral iliacal stenosis can be treated by transluminal angioplasty. Longer or multifocal stenosis required individual consideration.

Aneurysm↗
PubMed1991

[Successful intraoperative angioplasty in bilateral fibromuscular dysplasia of the internal carotid arteries].

The authors report the clinical history of a 55-years old woman suffering from the multiplex stenosis of both internal carotid arteries caused by fibromuscular dysplasia. Successful intraoperative angioplasty was performed. In connection with their case the authors review briefly the clinical feature, diagnosis and therapy of fibromuscular dysplasia of the internal carotid artery.

Angioplasty, Balloon↗
PubMed1990

[The role of intraoperative angioplasty performed simultaneously with reconstructive vascular surgery].

21 arterial lesions were dilated intraoperatively in conjunction with primary vascular reconstructive procedures. Of these, five involved the iliac vessels, fourteen the femoropopliteal segment, one the subclavian artery and one the common carotid artery. 19 intraoperative balloon dilatations were successful and two were unsuccessful. Only one catheter-related complication were noted, it was a perforation of the wall of the artery caused by guidewire. No deaths occurred as a result of the combined procedure. Attention is drawn to the advantage of the intraoperative balloon dilatation and the authors recommend it on adequate conditions and correct indication.

Adult↗