Figure 2.

The artery diameter was first measured at baseline after 10 min of rest. Thereafter, occlusion of the right brachial artery was done with a blood pressure cuff on the forearm, inflated at least 50 mmHg above systolic blood pressure for 5 min. The next measurements were done at peak artery dilatation after release of occlusion. After a second 10-min resting period followed by sublingual nitroglycerine administration, the last measurements were done at peak artery dilatation.