what is tachycardia and what causes it
List of causes of Tachycardia. Following is a list of causes or underlying conditions (see also Misdiagnosis of underlying causes of Tachycardia) that could possibly cause Tachycardia includes: 1  Normal heart rate increase as response to various situations: 2  Exercise or exertion. 3  Large meal.
Tachycardia refers to an abnormally fast resting heart rate-usually at least 100 beats per minute. The threshold of a normal heart rate (pulse) is generally based on the person's age. Tachycardia can be dangerous; depending on how hard the heart has to work.