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[Opening of chronic coronary artery occlusions with a recanalization catheter]
H Sievert1, K P Köhler, G Kober
1Abteilung für Kardiologie, Universität Frankfurt.
Insights
Recanalization angioplasty successfully reopened 64% of chronic coronary occlusions, improving patient function. A specialized catheter enhanced success rates for difficult cases.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Medicine
Background:
- Chronic coronary arterial occlusions pose significant challenges for recanalization.
- Traditional guide-wire techniques have limitations in crossing complex occlusions.
Purpose of the Study:
- To evaluate the efficacy of percutaneous transluminal angioplasty (PTA) for recanalizing chronic coronary occlusions.
- To assess the utility of a specialized recanalization catheter in improving PTA success rates.
Main Methods:
- PTA was attempted in 44 chronic coronary occlusions using guide-wires and a specialized tapered recanalization catheter.
- The catheter facilitated guide-wire support, contrast injection, pressure measurement, and gradual dilation.
Main Results:
- Overall, 28 of 44 (64%) coronary occlusions were successfully re-opened.
- The recanalization catheter enabled re-opening in 17 of 25 (68%) cases where guide-wire passage failed.
- All patients demonstrated functional improvement post-procedure.
Conclusions:
- Percutaneous transluminal angioplasty, particularly with a specialized catheter, is effective for recanalizing chronic coronary occlusions.
- The technique leads to significant functional improvement in patients.
- Long-term patency rates were encouraging, though some restenosis and re-occlusion occurred.
Abstract:
Percutaneous transluminal angioplasty for recanalization was attempted for 44 chronic coronary arterial occlusions in 41 patients (two occluded vessels in three patients). In 11 instances the occlusion could be passed with a guide-wire. In the other 33 this was not possible. In 25 of them a 3, 4 or 5 F recanalization catheter, its end tapered to 2 or 3 F, was used. In this way re-opening was possible in 17 cases (68%). The catheter made it possible to splint or stiffen the guidewire to keep it straight, superselectively inject contrast medium, measure the pressure distal to the occlusion, and gradually bougie-like enlarge the resulting subtotal stenosis. A total of 28 of 44 coronary occlusions were re-opened (64%). All these patients were functionally improved. At subsequent angiography (a mean of 3.6 months later) 22 of 25 vessels had remained open, but ten had narrowed and three had become re-occluded.