“…It has been shown that MVD alone, without the presence of an obstructive coronary disease, can compromise myocardial perfusion and lead to LV systolic dysfunction 2,49,71–74 . As previously noted, these incipient (subclinical) systolic impairments do not present with WMA, thus not being able to be detected with conventional echocardiographic methods 6,20,75,76 …”