Biomedical subjects

J Montiel

Publications and source records attributed to J Montiel.

25 records · Page 2Linked to original sources

PubMed1994

[A report of a rare case of primary angiosarcoma of left atrium and a review of the literature].

A 66[correction of 60]-year-old female patient was admitted to hospital for clinical signs of pericardial tamponade. The pericardiocentesis revealed an hematic effusion and a left appendage mass was diagnosed by transesophageal echocardiography. At surgery, a left atrial tumour was resected which histological examination showed to be an undifferentiated angiosarcoma-endothelioma with difficult histological classification. The tumoral screening was negative and the patient was discharged from the hospital. Seven months later the patient was readmitted for two parasternal tumours which anatomopathologic study revealed to be subcutaneous metastases. The rare localization in the left atrium and subcutaneous metastatic spread were discussed.

Aged↗

PubMed1994

Retrograde strut embolization in a fractured Björk-Shiley mitral prosthesis.

The case of the minor strut fracture of a Björk-Shiley convexo-concave mitral valve, with retrograde embolization to a pulmonary vein is presented. Migration probably occurred during ventricular systole and the strut became anchored to the pulmonary vein wall. The patient underwent emergency mitral valve replacement with event free recovery. The strut was located by computed tomography postoperatively, and it has remained in the same location for over one and a half years.

Emergencies↗

PubMed1993

[Conservative mitral surgery for a tear of the valvular leaflets post-percutaneous mitral commissurotomy].

A case of a 32-year-old woman who developed acute mitral insufficiency after percutaneous mitral dilatation is presented. In spite the fact of having torn both leaflets, successful plastic repair of her valve was performed.

Adult↗

PubMed1993

[The implantation of a sequential endocavitary pacemaker in a patient with transposition of the great vessels after the Mustard correction].

A 31-year-old male patient, underwent Mustard operation in childhood for complete transposition of the great arteries. He required a sequential (DDD-mode) pacemaker due to a complete symptomatic auriculoventricular block, 25 years after the operation. Wires were inserted through the left cephalic vein and placed in the systemic atrium and ventricle, achieving correct sensing and stimulating thresholds. Atrial rhythm disturbances, specially sinus node dysfunction, are frequent after Mustard's operation and increase through the years following the surgical procedure. Atrioventricular conduction disturbances are rare. Treatment by endocavitary pacemaker implies a correct knowledge of the special anatomy in this congenital disease and its surgical correction.

Adult↗

PubMed1987

Post-tetanic contractile events further support the interaction of multiple neurotransmitters in the neuroeffector junction of the rat vas deferens.

Post-tetanic events were recorded in isolated, superfused, epididymal and prostatic halves of the rat vas deferens. Increasing the frequency of nerve stimulation from 0.15 to 15 Hz (1-30 s) and then back to 0.15 Hz produced a post-tetanic potentiation (PTP) of the muscular responses in the epididymal end but a post-tetanic inhibitory response (PTI) in the prostatic half. Both effects were abolished by tetrodotoxin or animal pretreatment with 6-hydroxy dopamine (6-OHDA). PTP was markedly reduced by reserpine treatment or tissue incubation with prazosin. PTI was not altered by adrenergic drugs but partially reduced by tissue application of bicuculline or strychnine, revealing that gamma-aminobutyric acid (GABA) may modulate the motor transmission towards the prostatic half of the rat ductus.

Animals↗

PubMedDate not supplied

[An aortobronchial fistula 11 years after the resection of a posttraumatic aortic aneurysm].

A case of a 47-year-old white male who developed an aortobronchial fistula eleven years after resection of a posttraumatic aneurysm of the descending aorta is presented. The clinical picture, the diagnostic problems as well as the treatment are presented and commented.

Aorta, Thoracic↗

PubMedDate not supplied

[Massive endobronchial hemorrhage due to pulmonary artery rupture caused by a Swan-Ganz catheter].

We present the case of a 69-year-old male bearing a Swan-Ganz catheter while undergoing aortic and mitral valve replacement. Massive hemorrhage through the endotracheal tube began after closure of the sternotomy. Selective endobronchial intubation was performed and the thorax immediately reopened to reveal a tear in the right pulmonary artery at the level of the middle lobar branch. The tear was sutured, and throughout the early postoperative hours the patient presented signs of active bleeding through thoracic drains, with persistent slight hemoptysis in the right branch of the endotracheal tube. Ventilation was controlled artificially with two synchronized respirators and positive end-expiratory pressure (PEEP) up to 10 cm H2O in the right lung. The double-lumen tube was removed after 15 days with no complications and the patient was released two months after surgery. Massive endobronchial hemorrhage resulting from perforation of the pulmonary artery or its tributaries caused by Swan-Ganz catheters requires early diagnosis and treatment based on airway protection and immediate location and control of the point of hemorrhage. Selective endobronchial intubation with double-lumen tubes, direct arterial surgery and use of PEEP may constitute a valid alternative for management of these patients, making resection unnecessary.

Aged↗