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[Myocardial protection by coronary autotransfusion during angioplasty]
H Geschwind1, G Boussignac, G Poirot
1Service d'Explorations Fonctionnelles, Hôpital Henri-Mondor, Créteil.
Insights
Coronary autologous blood perfusion inconsistently reduced myocardial ischemia during angioplasty. While beneficial for some, this technique may worsen ischemia in others, limiting its clinical use.
Area of Science:
- Cardiovascular Medicine
- Interventional Cardiology
- Myocardial Protection
Context:
- Assessing myocardial protection during percutaneous coronary intervention (PCI).
- Evaluating the efficacy of coronary autologous blood perfusion during balloon angioplasty.
- Investigating methods to mitigate ischemia induced by transient arterial occlusion.
Purpose:
- To determine if coronary autologous blood perfusion protects the myocardium against ischemia during balloon inflation in patients with left anterior descending artery stenosis.
- To assess the impact of autologous blood perfusion on ischemia markers and hemodynamic parameters.
Summary:
- A study involving 19 patients with left anterior descending artery stenosis explored coronary autologous blood perfusion during balloon inflation.
- Myocardial ischemia was evaluated using ECG, ventricular pressures, and dP/dt.
- Positive responses were observed in 11 patients, but 5 showed no improvement and 3 experienced increased ischemia, indicating inconsistent efficacy.
Impact:
- Coronary autologous blood perfusion shows variable effectiveness in reducing ischemia during PCI.
- The potential for adverse effects necessitates careful consideration before clinical application.
- Further research may be needed to identify patient subgroups who could benefit or to refine the technique.
Abstract:
Coronary autologous blood perfusion may protect the myocardium against ischemia during arterial occlusion due to balloon inflation. During balloon inflation, arterial blood was perfused via the balloon catheter in 19 patients with single proximal severe left anterior descending artery stenosis and normal left ventricular function. Blood was perfused using a contrast medium injector at a flow rate of 40 ml/min. The balloon was maintained inflated for 60 seconds at 6 atmospheres. Two inflations were performed with perfusion and 2 without. Myocardial ischemia was assessed by ST elevations on both the peripheral and intracoronary ECGs, changes in left ventricular systolic and end diastolic pressures and peak positive and negative dP/dt. A positive response was obtained in 11 patients. In 5 patients, the myocardial ischemia induced by dilatation was not alleviated by the perfusion and in 3 patients ischemia was increased by perfusion. In conclusion, ischemia is inconsistently reduced by autologous blood perfusion and its adverse effect in some patients could limit its use.