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Biomedical subjects

C Andersen

Publications and source records attributed to C Andersen.

At least 37 records · Page 2Linked to original sources
PubMed1989

Runaway pacemaker: a still existing complication and therapeutic guidelines.

Runaway pacemaker is a rare, but still existing potential lethal complication in permanent pacemakers. Within 4 1/2 years, we saw two cases of runaway pacemaker in patients with multiprogrammable, VVI pacemakers (Siemens-Elema, Model 668). In both cases a pacemaker-induced ventricular tachycardia (rate 240-260 beats/min) was documented. One patient died. Runaway pacemakers must be exchanged as soon as possible. Until this can be accomplished, different emergency maneuvers should be tried. As documented in the cases presented, placing a magnet over the pacemaker may result in a lower, more physiological pacing rate. Reprogramming the pulse generator to a lower output or the use of external chest wall overdrive stimulation may also be successful, but these procedures require the presence of an adequate escape rhythm. If this is not the case or the former maneuvers have failed, an external pacemaker may be connected to the permanent pacing lead. Thereafter, the lead can be safely cut. As an alternative, a temporary transvenous pacing lead may be established prior to disconnecting the permanent pacing lead.

Aged↗
PubMed1989

Pacemaker-induced tachycardia during general anaesthesia: a case report.

Pacemakers with a rate-responsive function, based on calculation of ventilatory minute volume, may induce tachycardia in patients who undergo hyperventilation during general anaesthesia. If hyperventilation is desired, it is recommended that the pacemaker is reprogrammed in order to avoid tachycardia. If the programming device is not available, a magnet may be placed over the pacemaker site to convert it to fixed-rate pacing.

Aged↗
PubMed1989

Transvenous retrieval of intracardiac catheter fragments.

Six cases of catheter embolism are presented, and various techniques of retrieving these foreign bodies from the heart are described. The techniques may be carried out under local anaesthesia. They are rapid, safe and enable the patients to avoid thoracotomy.

Adolescent↗
PubMed1989

Pacing in a patient with Ebstein's anomaly.

We report a case of Ebstein's anomaly in which ventricular pacing was achieved by positioning a pacing lead in the enlarged right atrium. By placing the electrode in the atrialization of the right ventricle, an aggravation of tricuspid regurgitation that may result from catheter displacement of the valve leaflets is avoided.

Adult↗
PubMed1989

Pregnancy and cesarean section in a patient with a rate-responsive pacemaker.

The function of a rate-responsive pacemaker was monitored during pregnancy and cesarean section in a woman with complete atrioventricular block. The observations during pregnancy were compared to similar observations obtained in a pregnant normal woman of comparable age, height and weight, and in 12 normal women during elective cesarean section. During pregnancy, the heart rate increased in the normal woman, whereas the pacing rate in the woman with the implanted pacemaker was unchanged. Fetal movement caused an increase in pacing rate in the 37th week of gestation, whereas the heart rate in the normal woman did not respond. During cesarean section the pacing rate was generally within the mean +/- 1 SD for normal women.

Adult↗
PubMed1989

[Aspects of roentgen ray burden in endourologic surgery].

In 1987 a total of 322 endourological procedures with punctual use of x-rays were performed at our ultrasonographic-radiological working table. The personal-dosimetric supervision of 4 surgeons who performed the interventions was analyzed in dependence of our local dosimetric realities. The radiation exposure of the surgeon and the possibilities of supervision and reduction of the exposition are presented.

Body Burden↗
PubMed1988

Laryngospasm-induced pulmonary oedema.

A case of pulmonary oedema following laryngospasm in a healthy young woman is reported. Laryngospasm occurred following surgery and was treated with positive pressure oxygen ventilation by mask and by deepening of the level of anaesthesia. The rest of anaesthesia was uneventful. During the following hour, spontaneous respiration deteriorated progressively and ended in manifest pulmonary oedema which was treated by endotracheal intubation and mechanical ventilation with PEEP for some hours.

Adult↗
PubMed1987

Antacid treatment of duodenal ulcer.

Sixty-seven consecutive outpatients with endoscopically verified duodenal ulcer were randomised to a double-blind treatment with either 10 ml of an antacid suspension (buffering capacity 85 mmol/10 ml, packed in single dosage pads) 1 and 3 h after each meal and at bedtime or cimetidine 400 mg b.i.d. The double-dummy technique was employed. Endoscopy was performed after 4 weeks treatment and, if the ulcer had not healed, after 8 weeks treatment. When ulcer healing had occurred, the patient entered a 1 year follow-up study. The cumulative healing rates after 4 and 8 weeks treatment were 83 and 97% vs. 69 and 94% in the antacid and cimetidine groups respectively. No significant differences were observed between the treatment groups regarding ulcer healing, symptom relief or compliance. Adverse reactions were few and only 3 (9%) patients in the antacid group had to discontinue the treatment due to diarrhoea. Of the cimetidine treated patients, 61% had symptomatic relapse during the 1 year follow-up compared to 71% of the antacid treated patients. There were no significant differences in recurrence rate or time to relapse. The moderate dose antacid treatment used here is efficient, well tolerated, safe, convenient and is a good alternative treatment of the duodenal ulcer patient.

Adult↗
PubMed1987

Bronchoplastic procedures for bronchial carcinoma.

In a 22-year period from 1962 to 1984, 51 patients with malignant lung disease had a sleeve resection performed. In 33% of the patients, pneumonectomy was contraindicated because of limited lung function. The operative mortality was 8%. Six per cent of the patients developed complications after the operation. The 5-year survival of the total group of patients was 30%. Patients with lesions classified as stage 1 and stage 2 had the best prognosis, with a 5- and 10-year survival of 43.5% and 27%, respectively. In patients classified as stage 3 and stage 4, the 5- and 10-year survival was 20%. A postoperative measurement of regional ventilation and perfusion indicated that the function of the remaining lung was presumably undisturbed by the operation. Also, the vital capacity and FEV 1 were only minimally reduced as a result of the operation. The amount of functional lung tissue spared by the operation compared to pneumonectomy was estimated to 39%. Because of these functional results and the promising 5-year survival figures, we suggest that sleeve lobectomy should be the operation of choice for tumors localized to the upper lobe orifice involving the main bronchus.

Adult↗