I have been experiencing some episodes with quite a high pulse lately, and my doctors have told me that it is just sinus
tachycardia. And they told me that I can try to stop the attacks by attempting the valsalva maneuver. The thing is, that when I do this, I get a really strange effect from it. During the valsalva you force air agains a closed glottis, and hold that pressure for maybe 10 sec.
When i release the air, my heart acts REALLY weird.