Tachycardias (rapid beating) If ectopic beats come in runs and occur rapidly they are called tachycardias, taking their name from the site of origin of the ectopic e.g., atria, AV node or ventricular tachycardias. These tachycardias cause symptoms because the heart rate is increased to approximately 200 beats a minute. … ABNORMAL PALPITATIONSRead more