Heart arrhythmias refer to dangerous or irregular heartbeats. An arrhythmia of the heart occurs when the electrical signals that tell the heart to beat misfire. It is possible to have a very fast or sluggish heartbeat.
The following are the Causes of High Heart Rate:
Coronary artery disease
Irritable tissue in your heart (due to genetic or acquired causes)
High blood pressure
Changes in your heart muscle (cardiomyopathy)
Heart valve disorders
Electrolyte imbalances in your blood
Injury due to a heart attack
During recovery process of heart surgery
