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Biomedical subjects

Y Weng

Publications and source records attributed to Y Weng.

115 records · Page 7Linked to original sources
PubMed1992

[Heart transplantation--indications and results].

Heart transplantation has become a standard procedure in the treatment for irreversible heart failure. Criteria for both recipients and donors have been extended. One year survival now reaches 81%. In the immediate postoperative course patients are endangered by infection. In the long-term course coronary artery disease of the transplanted heart becomes the most serious problem. Alteration of liver and kidney function due to chronic medication as well as malignancies and hypertension also occur. In case of chronic transplant failure retransplantation may be indicated. Acute cardiac failure before transplantation nowerdays can be treated by mechanical circulatory assist devices.

Follow-Up Studies↗
PubMedDate not supplied

[Transthoracic pacing in a very low birth weight infant with congenital complete atrioventricular block - Case report].

We report our experience of pacemaker treatment in a premature infant of 832 grams with congenital complete atrioventricular block due to maternal Sjögren's Syndrome. She was delivered by cesarean section at an estimated gestational age of 26 weeks because of fetal bradycardia, decreasing fetal movements and hydrops. Immediate postnatal transesophageal ventricular pacing was not successful, whereas transthoracic pacing with self-adhesive patch electrodes adapted to body size resulted in an effective increase of the infant's heart rate until operative application of temporary epimyocardial pacing wires ensured the external stimulation of the heart.

Adult↗
PubMedDate not supplied

Mechanical circulatory support and heart transplantation. Pre-operative status and outcome.

Between July 1988 and December 1993, 118 patients waiting for heart transplantation underwent mechanical circulatory support by an extracorporeal, pneumatically driven assist device (the Berlin Heart System) to maintain a sufficient circulation and to restore impaired organ function (109 patients requiring a biventricular assist device [BVAD], 9 patients requiring a left ventricular assist device [LVAD]). Before implantation, all patients were in severe cardiogenic shock, despite maximum inotropic support; all had end organ failure. The aim of a retrospective study in 70 patients (for whom pre-operative parameters were available) was to identify patients who would permit from this procedure and could undergo successful transplantation. After a mean bridging time of 34.8 days, 75 (63.5%) patients underwent transplant, and 52 (44.1%) were discharged. Pre-operative coagulation parameters (fibrinogen, antithrombin III, platelet count, and kinetics) were correlated to post-operative blood loss and outcome. Patients who had no or mild coagulation disorders because of a shorter phase of low cardiac output before implantation of the assist device proved to gain faster restitution of organ function and most underwent transplantation. As a result of these observations, implantation of an assist device before shock-induced coagulopathy could occur allowed a greater number of patients to undergo successful bridging and be discharged after heart transplantation.

Adolescent↗
PubMedDate not supplied

Mechanical circulatory support for post cardiotomy cardiogenic shock in infants.

Eleven infants weighing 2.3 to 7.8 kg underwent mechanical circulatory support for post cardiotomy cardiogenic shock. Initiated pre-operatively in two patients, extracorporeal membrane oxygenation was used in a total of eight patients aged 6 days to 3 months in association with repair of cyanotic congenital heart disease with increased pulmonary blood flow or with a right sided obstructive lesion. Ventricular assist devices were used in three other patients: a centrifugal left ventricular assist device in Patient 1 (10 months, 5.7 kg) after repair of the anomalous left coronary artery, and a pneumatic biventricular assist device (stroke volume 12 ml) in Patient 2 (6 months, 7.0 kg) for cardiac arrest after closure of ventricular septal defect and in Patient 3 (10 months, 7.8 kg) for post transplant graft failure. Duration of extracorporeal membrane oxygenation duration ranged from 26 to 192 hr (mean, 88 hr). Three patients were weaned from extracorporeal membrane oxygenation and two survived. Two others were separated from extracorporeal membrane oxygenation because of bleeding, but both subsequently died. Patient 1 was weaned from the left ventricular assist device after 192 hr and discharged from the hospital. Support was discontinued after 45 hr in Patient 2 who exhibited irreversible brain damage. Patient 3 was weaned from a biventricular assist device after 174 hr, but suffered recurrent graft failure. Our results show that an appropriate circulatory support system should be selected according to the cardiac anatomy in infants.

Acute Kidney Injury↗