tachycardia

noun Medicine/Medical.

1. excessively rapid heartbeat.

noun

1. pathol abnormally rapid beating of the heart, esp over 100 beats per minuteCompare bradycardia

n.1868, Modern Latin, coined 1867 by German-born physician Hermann Lebert (1813-1878) from tachy- “swift” + kardia “heart” (see cardiac). n.

1. A rapid heart rate, especially one above 100 beats per minute in an adult.tachyrhythmia