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Microvascular dysfunction and vasospastic angina are significant factors affecting patient outcomes, particularly as research shows that a large percentage of angina patients do not have coronary stenosis. In fact, approximately 50% of these patients experience angina without stenosis, and this condition is associated with poorer health outcomes than previously believed, particularly in certain populations. For instance, vasospastic angina has been linked to increased morbidity, and evidence suggests that treatments like calcium antagonists can significantly improve outcomes. Understanding the mechanisms behind symptoms is crucial, as tailored treatments such as vasodilators or beta blockers can be effective depending on whether spasm or reduced coronary flow reserve is the underlying issue.