Heart palpitation

Heart palpitations are fast, strong and/or irregular heartbeats, and can occur as a symptom of ME/CFS. 

Prevalence

 * Katrina Berne reports a prevalence of 40-60% for heart palpitations.

Symptom recognition
Palpitations are a symptom recognized in the Canadian Consensus Criteria for ME/CFS.

Tachycardia/heart palpitations are a potential symptom of Long COVID in the World Health Organization's definition.