Primary endpoint
The average weekly use of nitroglycerin was 5.5 in the LIPUS group and 5.9 in the placebo group, and the average CCS class score was 2.4 in the LIPUS group and 2.6 in the placebo group. The average weekly use of nitroglycerin (times/week) decreased from 5.50 to 2.44 in the LIPUS group and from 5.94 to 2.83 in the placebo group (