Hi, Tachycardia is a faster than normal heart rate at rest. A healthy adult heart normally beats 60 to 100 times a minute when a person is at rest. Any condition that puts a strain on the heart or damages heart tissue can increase your risk of tachycardia. Lifestyle changes or medical treatment may decrease the risk associated with the following factors: Exercise Heart disease High blood pressure Smoking Heavy alcohol use Heavy caffeine use Use of recreational drugs Psychological stress or anxiety Anemia Fever Imbalance of electrolytes, mineral-related substances necessary for conducting electrical impulses Overactive thyroid (hyperthyroidism)