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Biomedical subjects

A Ahmadi

Publications and source records attributed to A Ahmadi.

At least 73 records · Page 4Linked to original sources
PubMed1988

[Modified Blalock-Taussig anastomosis. Its significance within the scope of surgical treatment of tetralogy of Fallot].

We report our results with 14 cases of tetralogy of Fallot, which were treated with a modified Blalock-Taussig shunt first, total correction having been performed in 9 of them after a mean interval of 15 months. The age of the patients ranged from 12 days to 3.3 years, with a mean of 4.7 months in 12 patients below the age of one year. In 11 cases we used a 5 mm Gore-Tex prosthesis, in 2 a 6 mm prosthesis and in one a 4 mm prosthesis. All children survived the operation. In one case shunt thrombosis occurred after a bout of pneumonia and a second shunt had to be constructed on the other side. Control angiography, performed after a mean period of 15 months in 13 patients revealed a patent shunt, though angulation of the ipsilateral pulmonary artery was noted in one case. The ratio of the diameter of the pulmonary artery to the aorta increased by 20%. The significance of these findings with regard to the question of primary or two-stage repair in infants less than one year old is discussed in view of different risk factors.

Anastomosis, Surgical↗
PubMed1987

The forearm flap as a free neurovascular flap for treatment of an extensive bone/soft-tissue defect in the calcaneal part of the foot.

A discussion is presented on the case of a 28-year-old motorcyclist who had an accident and got caught in the spoked wheel of her vehicle. The result was an extensive soft-tissue injury of the metatarsus and calcaneal part of the foot, a defect fracture of the calcaneus, an osseous disinsertion of the Achilles tendon, a lateral malleolus Weber type-A fracture, and a fracture of the second metatarsal bone. The primary treatment consisted in extensive débridement of the strongly contaminated soft parts and refixation of the Achilles tendon on the calcaneus with two osteosynthesis screws. The bruised skin flaps remaining were adapted in a tension-free manner. However, this was possible only in a considerable talipes equinus position. In the further course, the patient developed an extensive skin and soft-tissue necrosis over the calcaneal part of the foot. A neurovascularly pedicled forearm flap was freely grafted in order to maintain the load capacity of the calcaneal part of the foot, to prevent osteitis of the calcaneus, to correct the talipes eqinus position, and to achieve a resensibilization in the load zone of the sole. The healing result was good, and it was possible to achieve extensive correction of the talipes equinus position as well as prevention of calcaneus osteitis; the function of the Achilles tendon was also maintained. Moreover, there was satisfactory resensibilization of the calcaneal part of the foot, so that the patient can now walk in ready-made shoes with a fully molded arch support.

Achilles Tendon↗
PubMed1987

[Apophyseal rupture of the pelvis and lower extremity caused by sports].

Apophyses are secondary ossification centers and serve as the insertion or origin of tendons. They are under a dynamic but not static load. During sexual maturity, they represent a weak point in the locomotor system. Apophyseal injuries can apparently be attributed to an incongruity between load tolerance and increased strain on the seam of the apophysis. The majority of these injuries occur during sports and involve men more frequently than women. The injury is often primarily misinterpreted as a pulled-muscle. The treatment method is dependent on the localization of the injury and the extent of the fragment dislocation.

Adolescent↗
PubMed1987

[Differential diagnosis of Madelung's deformity: Léri-Weill syndrome].

The Léri-Weill-syndrome is a very rare disease. The presence of Madelung's deformity is the important feature to distinguish this dyschondrosteosis from other system diseases of the skeleton combined with mesomelic dwarfism. Mesomelic dwarfism is mostly located in the lower extremity. If the deformity causes pain it is necessary to do a corrective osteotomy of the distal radius.

Adult↗
PubMed1987

[Thermography as an additional study method in the follow-up of reconstructive operations of the hand].

The hand is very accessible to thermography. Disturbed circulation, vascular disease, tissue damage, or other causes of change in thermoproduction lead to deviation from a normal temperature chart. We found a high correlation between thermographic readings and prognosis after replantation. Thermography is, therefore, a method of examination that can be recommended.

Amputation, Traumatic↗
PubMed1983

Congenital aortic thrombosis with complete obliteration of the aortic arch and the great vessels.

Thrombosis of the great arteries rarely occurs in the neonate. We report a case of thrombosis of the aortic arch, the brachiocephalic truncus, the left carotid and subclavian arteries, seen in a one-day-old neonate. The clinical findings were at first misdiagnosed as interrupted aortic arch syndrome, though, in retrospect echocardiography was very suggestive of the correct diagnosis. On the basis of the histological examination we assume, as the most likely cause for thrombosis, an aortitis in the prenatal period. Following thrombectomy and Gore-Tex bypass from the ascending to the descending aorta, combined with ligature of a PDA, the child developed a low output state and died on the table. The postmortem examination revealed that the latter was due to multiple infarcts of the left ventricular myocardium.

Aorta↗
PubMed1979

[Clinical and hemodynamic studies before and after mitral valve replacement (author's transl)].

Clinical and hemodynamic studies were carried out before and after replacement of stenotic mitral valves in 17 patients, 10 of whom received Björk-Shiley (low profile mechanical) prostheses and 7 who received (porcine heterograft) bioprostheses. Mitral valve replacement led to amelioration of symptoms, improvement of phonocardiographic findings and, partially, to a lowering of pressure in the pulmonary circulation, augmentation of cardiac output, lessening of the pulmonary arteriolar and mitral valvular resistances as well as incrementation of mitral valve orifice area. Preexistent ECG changes, radiologic heart size, right ventricular filling pressure and stroke volume remained unaltered. In consideration of variables such as prosthetic size, severity of the disease and post-operative follow-up periods, the results obtained with both types of prostheses were comparable. The prostheses, however, inherently are responsible for a moderate degree of mitral stenosis which compromises exercise capacity and generally does not lead to normalization of pressure in the pulmonary circulation. Irreversible myocardial damage appears responsible for the fact that electrocardiographic abnormalities, the heart size, the right ventricular filling pressure and stroke volume remain unaltered postoperatively. Thus, patients who have undergone mitral valve replacement continue to require limitation of physical activities, a tailored medical regimen and close cardiologic follow-up.

Adult↗
PubMed1979

[Bypass operation of aortic coarctation in older patients (author's transl)].

Besides the typical operative technique in order to correct congenital aortic coarctation in the older patient the bypass operation is to be considered. Low incidence of intraoperative bleeding and very good postoperative haemodynamic findings induced us to prefer this method in older patients and in special indications as occluded congenital hypoplastic aortic arch.

Adult↗
PubMed1979

[Percutaneous transluminal revascularization of lower-leg arteries].

In 19 of more than 130 patients treated with percutaneous transluminal angioplasty (PTA), obstructions of the distal popliteal artery and the lower leg arteries encouraged us to extend the treatment to this vascular region. Two weeks after PTA the arteries were patent in 16 of the 19 cases (84%). These results are comparable with those of vascular surgery, but are gained with less injury to the patient and a shorter hospitalization time.

Aged↗
PubMed1977

[New transplantation materials for reconstructive arterial surgery].

For reconstruction of femoral artery occlusion autologous vena saphena is the best material. In all cases of reocclusion after autologous vein bypass or in cases without adequate vena saphena the heterologous Solco-Collagen-Graft and the new alloplastic Gore-Tex-Teflon arterial prosthesis are two alternative materials. First clinical experiences with the Gore-Tex-Graft in 45 patients and clinical experiences with the bovine Solco-Graft in 54 patients are presented. Both the bovine Solco-Graft and the alloplastic Gore-Tex-Graft provided a patency rate of 75% in patients with chronic arterial diseases state III-IV after 1 year. The special indications for either heterologous bovine Solco-Graft or alloplastic Gore-Tex-prosthesis are demonstrated.

Animals↗
PubMed1976

[Iatrogenic foreign bodies in heart (author's transl)].

Two cases are reported of migrating Kirschner wires, which had been inserted for stabilisation of bony defects of the thoracic cage. The wires migrated in both patients to the heart and caused life threatening complications like pericardial tamponade, arrhythmias and cardiac insufficiency. Indications for removal of foreign bodies from the heart are discussed. Attention is drawn to the fact that the ends of Kirschner wires must be bent in order to prevent migration.

Adolescent↗
PubMed1975

[Isolated rupture of the interventricular septum after blunt chest trauma (author's transl)].

The mechanism, symptoms and treatment of traumatic ventricular septal defect are discussed on the basis of an own observation. To the best of our knowledge this is the first report of a rupture of the membranous septum, involving the portion between the left ventricle and the right atrium. An attempt is made to explain the mechanism of isolated traumatic ventricular septal rupture on the basis of embryological considerations. The patient died on the 11th postoperative circulatory status and inspite rather prompt diagnosis and operative treatment.

Accidents, Occupational↗