Palpitation
Palpitations were rapid and irregular beatings of the heart.

In 2268, Dr. Leonard McCoy asked Lieutenant Commander Montgomery Scott if he was experiencing palpitations after exposure to a gas grenade. ()

In 2370, during her examination of "Jayden" (Data), Talur asked him if he had experienced palpitations. ()

Soon after, Reginald Barclay believed that the palpitations he was experiencing were a symptom of the Terellian Death Syndrome or possibly Symbalene blood burn. Thankfully, Dr. Beverly Crusher assured him he only had Urodelan flu. ()

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Medical conditions