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Improved global and regional left ventricular function after angioplasty for chronic coronary occlusion
E Engelstein1, W Terres, D Hofmann
1Abteilung für Kardiologie, Medizinische Klinik, Universitäts-Krankenhaus Eppendorf, Hamburg, Germany.
Insights
Successful percutaneous transluminal coronary angioplasty for chronic total coronary occlusion significantly improves left ventricular function. Persistent vessel patency after the procedure is key to this recovery.
Area of Science:
- Cardiology
- Interventional Cardiology
- Cardiac Function Assessment
Background:
- Chronic total coronary occlusion (CTO) poses challenges in treatment.
- Percutaneous transluminal coronary angioplasty (PTCA) is a potential revascularization strategy for CTO.
- Assessing the impact of successful CTO recanalization on left ventricular (LV) function is crucial.
Purpose of the Study:
- To evaluate the effect of successful PTCA on LV global and regional function in patients with CTO.
- To determine if persistent vessel patency post-PTCA correlates with improved LV function.
- To identify factors influencing LV function changes after CTO recanalization.
Main Methods:
- Contrast angiography was used to assess LV ejection fraction (global and regional) in 49 CTO patients.
- Measurements were taken before and approximately 10 weeks after successful PTCA.
- Follow-up coronary angiography identified patients with patent arteries versus reocclusion.
Main Results:
- Successful PTCA led to significant improvement in global ejection fraction (55.8% to 62.5%, P < 0.001) and regional wall motion (-1.7 to -0.6 SD/chord, P < 0.001) in 37 patients with patent arteries.
- In 12 patients (24%) with reocclusion, no significant changes in LV function were observed.
- Improvements in LV function were independent of angina severity, occlusion duration, prior infarction, or collateralization.
Conclusions:
- Persistent vessel patency after PTCA for CTO is the primary determinant of improved LV global and regional function.
- Successful recanalization and sustained patency are essential for cardiac recovery in CTO patients.
- PTCA can be a safe and effective treatment for CTO, with functional benefits linked to vessel patency.
Abstract:
Percutaneous transluminal coronary angioplasty can be performed safely and effectively in patients with chronic total coronary occlusion. To investigate the effect on left ventricular function, global and regional left ventricular ejection fraction were analyzed by contrast angiography in 49 patients before and 10 +/- 6 weeks after successful recanalization. Coronary angiography at follow-up showed reocclusion in 12 patients (24%). In 37 patients with patent arteries global ejection fraction increased from 55.8 +/- 7.1% at baseline to 62.5 +/- 11.3% at follow-up (P < 0.001), and regional wall motion assessed by the centerline method improved from -1.7 +/- 1.0 to -0.6 +/- 1.5 standard deviations/chord (P < 0.001). In contrast, in patients with reocclusion neither global ejection fraction nor regional wall motion were significantly different at follow-up compared with baseline. Changes in global or regional left ventricular function after coronary recanalization were unrelated to other parameters such as severity of angina, duration of occlusion, history of myocardial infarction, presence or absence of visible collaterals, or baseline left ventricular function. Thus in patients with primarily successful recanalization of chronically occluded coronary arteries persistent vessel patency is the major determinant of global and regional improvement of left ventricular function.