Palpitations otherwise arrhythmia, cardiac arrhythmias. This involves an irregular contraction of the heart muscle, and the frequency is outside the norm, which ranges from 60 to 100 beats per minute. This condition is usually life threatening. The heartbeat is over 100 beats per minute. With the increase in physical exercise increases frequency of cardiac muscle contraction. Working with the increased number of heart beats per minute, may cause harmful effects. Some of the causes of cardiac arrhythmias should also be stress.
Cardiac arrhythmias are diagnosed by obsłuchiwanie heart tones. One of the more serious forms of cardiac arrhythmia is atrial fibrillation. Occurs when the contraction is not effective.