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Valsalva maneuver - Wikipedia
Valsalva Maneuver: How to Do It and When to Use It - WebMD
Valsalva maneuver: How to do it, uses, and warnings - Medical News Today
Valsalva Maneuvers: What They Are and How to Do Them - Cleveland Clinic
Valsalva Maneuver: Definition, How-To, Uses, Warnings, and More
Valsalva Maneuver - StatPearls - NCBI Bookshelf
How the Valsalva Maneuver Works - Verywell Health
Valsalva Maneuver: What It Is and How to Do It - Healthgrades
Valsalva Maneuver | Physiology, Benefits, Dangers - YouTube
The Valsalva manoeuvre: physiology and clinical examples