Copyright © 1995 by the European Society of Cardiology.
© 1995 The European Society of Cardiology
The effects of calcium antagonists after PTCA
Compass-Reha-Centrum, Rehabilitationseinrichtung für Herz-Kreislauf-und Gefäβerkrankungen Kiel, Germany
Correspondence: Priv.-Doz. Dr. E. Hoberg, Compass-Reha-Centrum, Heikendorfer Weg 9-27, D-24149 Kiel, Germany
Experiments have shown that calcium antagonists can prevent restenosis after coronar angioplasty. The first controlled clinical trials, however, failed to show such a benefit after PCTA: the recurrence rate was not signnificantly influenced by either nifedipine (10 mg q.i.d.) or diltiazem (90 mg t.i.d.). Another trial used a higher dose of diltiazem (mean 329 mg per day) in a larger number of patients, but again the result was negative. in contrast, diltiazem 180 mg per day was reported more recently to significantly reduce restenosis, and high-dose verapamil treatment was similarly successful in a subgroup of patients with stable angina pectoris at the time of primary successful PCTA.
Despite some important limitations of the five monocentre trials, the combined analysis of the results shows that calcium antagonists have a beneficial effect on restenosis rate after PTCA. Whether this effect is limited to heart rate slowing substances and to special subgroups of lesions has to be clarified by further studies in sufficiently large patient populations.
Key Words: Calcium antagonists coronary angioplasty restenosis stable angina pectoris
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