Why the study?
Do all patients with variant angina of Prinzmetal have significant focal coronary obstruction?
Do all patients with variant angina of Prinzmetal have significant focal coronary obstruction?
Demonstrates that variant angina of Prinzmetal can occur in patients with normal coronary arteriograms, challenging the assumption that it is always caused by focal obstruction.
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Variant angina may occur without focal obstruction; case reports leave open its true prevalence.
Cheng et al. (1973) studied this question.
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