How to perform Valsalva maneuvre using 10 or 20 ml syringe

This technique is one of the most common vagal maneuver.

Ask patient to take a deep breath, then blow hard into the syringe to move the plunger.

Patient must blow into the syringe for at leat 15 seconds.

These vagual maneuver stimulate the vagus nerve and increase intrathoracic pressure.

During this process monitoring ECG and watch the changes.