Table 1.

Information and protocol of clinic test.

Date	From 12 October to 5 November 2021
Place	Tamaki-Aozora Hospital, Tokushima, Japan
Number of patients	168
Patient selection criteria	Patient who has a normal shunt condition with a blood flow of more than 200 mL/min
Preparation	Purpose and rule of the test were sufficiently explained to all patients beforehand
Rules for rejection of tests	They can refuse to participate at any time during the test
Measurement protocol	Measurement in resting sitting condition for 10 s