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Abstract
The NHLBI PTCA Registry collected clinical data on 3, 101 PTCA procedures performed
at 105 clinical centers between September 1977 and September 1981. To investigate
the “learning curve” from introduction through the early application of this new therapy
for revascularization, success rates and complication rates were examined by calendar
year and according to investigator experience. Success rates improved by calendar
year, from 54% in 1979 to 66% in 1981. Investigators with fewer than 50 cases had
a success rate of 55%. After an investigator had performed 150 procedures, the success
rate was 77%. The increase in success rate was largely the result of a dramatic increase
in the ability to cross the narrowing with the catheter, and was accounted for by
experience and improved equipment. Patient selection for PTCA was characterized by
sex, age, previous CABG, number of diseased coronary arteries and stable Canadian
Heart classification over time. Reflecting the increase in the success rate was the
decrease in the need to perform elective CABG. Emergency CABG, death and MI rates
were low (1% mortality, 5% nonfatal MI) and did not change significantly with time
or with investigator experience.
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Article Info
Footnotes
☆This study was supported in part by Contract N01-HV-02906 from the National Heart, Lung and Blood Institute, Bethesda, Maryland.
Identification
Copyright
© 1984 Published by Elsevier Inc.
