Copyright © 1998 by the European Society of Cardiology.
Improvement in left ventricular ejection fraction and wall motion after successful recanalization of chronic coronary occlusions
a Feiring Heart Clinic, Feiring, Norway
b Central Hospital of Rogaland, Stavanger, Norway
accepted June 20, 1997
Aims
This study assessed changes in left ventricular ejection fraction and regional radial shortening after successful angioplasty of chronic coronary occlusions.
Methods
We studied 95 patients with angina pectoris or exercise-induced ischaemia with a successfully recanalized chronic (median duration 4·3 months) coronary occlusion. Intracoronary stents were implanted in 71%. Left ventriculograms were obtained at baseline and after 6·7±1·4 months. Left ventricular ejection fraction and regional radial shortening were determined by a computer-assisted method.
Results
Left ventricular ejection fraction increased from 0·62±0·13 at baseline to 0·67±0·11 at follow-up (P<0·001). The change in left ventricular ejection fraction in patients with a patent artery and in patients with reocclusion (n=8) was 0·05±0·06 and 0·01±0·04, respectively (P=0·04). Regional radial shortening in the territory of the recanalized artery increased by 16% (from 0·28±0·11 to 0·32±0·11, P<0·001) in patients with a patent artery at follow-up, but was unchanged in patients with reocclusion.
Conclusion
Long-term patency after recanalization of old, chronic coronary occlusions in patients with angina pectoris is associated with improvement in global and regional left ventricular function. This may be a result of recovery of hibernating myocardium and supports the strategy of recanalizing chronic coronary occlusions.
Key Words: Coronary stenting • chronic total occlusions • Left ventricular function • hibernating myocardium
f1 Correspondence: Dr Per Anton Sirnes, Feiring Heart Clinic, 2093 Feiring, Norway. Email: psirnes@online.no
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