Examination with 16 MHz Doppler probe, passed through the endoscope evaluated the direction, waveform and amount of blood flow. Endoscopic diagnosis with 16 MHz is safe and allows identification of higher-risk varices, detection of penetrating varices, support of appropriate hemostasis, and evaluation after hemostatic treatment....

In the course of the Corona pandemic, studies1 revealed that the SARS-CoV-2 virus causes changes in and around the human vasculature that can be diagnosed by standardized examination methods of Transcranial Doppler Sonography (TCD)....

Since the outbreak of the SARS-CoV-2 virus pandemic, several studies have uniformly demonstrated that this coronavirus infection can cause endothelial and microvascular damage that can be diagnosed by Transcranial Doppler Sonography....