“…During recent years, it has been recognized that circulating microemboli (ME) are noninvasively detectable as high-intensity transient signals by transcranial Doppler (TCD) sonography [19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36]. ME have been reported in various patient groups suffering from or at high risk of embolic stroke [19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29].…”