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Figure 2 Angina pectoris and use of additional nitrates of 17 patients at baseline and three and six months after percutaneous myocardial revascularization, respectively. Anginal symptoms were recorded according to the Canadian Cardiologic Society Angina Scale (CCS class). Use of nitrates was recorded on a semiquantitative scale (see Methods section). Solid box = CCS class; striped box = use of nitrates.
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