A patient on hemodialysis three times a week visited the emergency room

The patient complained of dyspnea and chest x-ray showed cardiomegaly.

Vascular ultrasound was performed on suspicion of vascular access thrombosis.

Radiocephalic fistula had no thrill.

The attached image is an ultrasound examination performed at admission.

The ultrasound waveform is thought to be somewhat different from that of general thrombosis.

In conclusion, the patient underwent pericardiocentesis as an emergency after diagnosis with

acute cardiac tamponade.

I wonder if the shape of the ultrasonic waveform of the attached file is related to the cardiac

tamponade.

Thank you.