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[The recanalization of chronic coronary artery occlusions: what factors influence success?]
K Giokoglu1, W Preusler, H Störger
1Abteilung Kardiologie, Rotes-Kreuz-Krankenhaus, Frankfurt.
Insights
Percutaneous transluminal coronary angioplasty (PTCA) success in chronic coronary artery occlusions depends on occlusion characteristics. Factors like duration, length, and vessel anatomy significantly influence PTCA outcomes.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Medicine
Context:
- Chronic coronary artery occlusions pose significant challenges in cardiovascular treatment.
- Percutaneous transluminal coronary angioplasty (PTCA) is a key intervention for these conditions.
- Understanding factors influencing PTCA success is crucial for patient selection and procedural planning.
Purpose:
- To analyze the outcomes of PTCA in patients with chronic coronary artery occlusions.
- To identify specific factors that predict the success or failure of PTCA in this patient cohort.
- To provide data that can help refine the indications for PTCA in chronic occlusions.
Summary:
- PTCA was attempted in 509 patients with chronic coronary artery occlusions, achieving an initial success rate of 55.8%.
- Success rates were significantly reduced by occlusions persisting over 6 months, occurring at vessel kinks, lacking a vessel stump, or exceeding 10 mm in length.
- Conversely, success was higher with absent intracoronary anastomoses, straight vessel occlusions, presence of a vessel stump, shorter duration (<4 weeks), and shorter length (≤10 mm).
Impact:
- These findings highlight the critical role of occlusion site, duration, length, collateral circulation, and vessel stump presence in determining PTCA success.
- This knowledge aids in better patient selection and optimizing procedural strategies for PTCA in chronic coronary occlusions.
- Improved understanding can lead to more effective treatment planning and potentially better patient outcomes.
Abstract:
Between January 1986 and June 1990, recanalization with guide-wire and balloon angioplasty (PTCA) was attempted in 509 patients (416 men, 93 women; mean age 57.5 +/- 9 years) with chronic coronary artery occlusions. The data recorded were analysed to determine the factors which influenced the outcome. The intervention was initially successful in 284 patients (55.8%; circumflex branch: 50%; right coronary artery: 52%; venous bypass graft: 50%; anterior interventricular branch: 64%). The success rate was markedly reduced if (1) the occlusion had persisted for more than 6 months (9.5%; P < 0.001); (2) occlusion had occurred at or after a vessel kink (28.5%; P < 0.001); (3) there had been no vessel "stump" (36%; P < 0.01) and (4) the occlusion was longer than 10 mm (40.7%; P < 0.05). The success-rate was higher if (1) intracoronary anastomoses were absent (61.2%); (2) occlusion had occurred in a straight vessel (62.6%); (3) there had been a vessel stump (64%); (4) the occlusion had persisted for less than 4 weeks (68.5%) and (5) the length of occlusion was < or = 10 mm (75.8%).-These data indicate that the success of PTCA after chronic coronary artery occlusion depended on the site of occlusion, its duration and length, absence of orthograde collaterals and the presence of a vessel stump. Knowing the extent of these factors helps in delineating the indications.