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Biomedical subjects

G Girod

Publications and source records attributed to G Girod.

5 recordsLinked to original sources
PubMed2000

Developing clinical indication for multisite pacing.

The artificial activation of the heart modifies the mechanics of contraction and relaxation. While only little basic research has been addressed to this question, clinical observations showed that for hypertrophic as well as dilated cardiomyopathies appropriate pacing techniques can be useful. Pacing can influence the activation sequence. The spread out from a single site is slow, and so hypercontractility deminshed. With the use of multiple electrodes, two atrial and/or two ventricular, conduction delays in the atria or ventricles can be eliminated. Synchronisation of the cardiac activation has an anti-arrhythmic and positiv inotropic effect. This may lead to new indications for pacemakers or better to be named cardiac synchronisers.

Cardiac Pacing, Artificial↗
PubMed1999

[Cardiac pacing. Percutaneous extraction of infected pacing catheter].

Infection of a cardiac pacemaker is a rare but serious complication. Percutaneous ablation of the pacemaker and pacing catheter is the only effective treatment. Techniques of extraction of pacing systems have been evaluated but the long term results require analysis. Eighteen patients with infection of cardiac pacemakers underwent extraction of one or more pacing catheters (14 atrial and 20 ventricular) in one same centre. The indication was infection of the pacemaker unit (12 cases) or septicaemia (6 cases) The causal organism was a staphylococcus (aureus: 7 cases, epidermidis: 10 cases, capitis: 1 case). Three techniques were used: 1) direct external manual traction, 2) internal traction with several devices, 3) endovascular counter-traction (Byrd-Cook system). The time from primary implantation of the pacing catheter to its extraction was 42 months and from last pacemaker manipulation to infection, 23 months. The average duration of the extraction procedure was 120 +/- 45 minutes; that of fluoroscopy was 10 +/- 6 minutes. The first technique was used 12 times, the second 8 times and the third 14 times, with complete extraction of the catheter in 88.2% of cases. The metallic tip of the distal electrode embolised in 2 cases and remained stuck in the right ventricle in 1 case. Only one pacing catheter was abandoned. After an average follow-up of 45 months, none of the patients had recurrent infection or any other complication. The authors conclude that extraction of infected pacing catheters is safe and effective. It is the treatment of choice of this complication.

Aged↗
PubMed1998

[Long-term follow-up after implantation of a coronary endoprosthesis].

UNLABELLED: The authors analysed the long-term clinical and angiographic follow-up of patients after coronary stenting for the treatment of coronary stenosis of a native artery or vein graft. BACKGROUND: The need for revascularization at 6 months and the restenosis rate were decreased after coronary stenting, compared to the conventional percutaneous angioplasty. This benefit appears to persist in the longer term. METHOD: The incidence of major clinical and angiographic complications was evaluated in 129 patients with a minimum follow-up of 3 years. RESULTS: At 6 months, 20% of patients presented a major clinical complication and restenosis was documented in 20% of cases. In the long-term, a major cardiac event was observed in 49% of cases (death: 16%, infarction: 5%, coronary artery bypass graft: 12% and another angioplasty: 16%). Patients treated by stenting during coronary artery bypass graft had a significantly lower survival (60% versus 88%), and a higher incidence of major clinical complications (55% versus 18%), and a higher stent revascularization rate (41% versus 16%). CONCLUSION: The late stent revascularization rate was low. Overall survival was significantly higher in patients treated for a native vessel than in those treated for a coronary artery bypass graft. The complication rate and stent revascularization rate were also significantly lower.

Aged↗