An arrhythmia is an atypical heartbeat that is either much faster or slower than expected. Your heartbeat may be described as chaotic, rather than steady and predictable. There are several types of ...

An arrhythmia is an irregular heartbeat. An arrhythmia may feel like a racing heart or fluttering. It is not always serious but can sometimes indicate a potentially fatal heart problem. Arrhythmias — ...

Certain pre-existing heart conditions, like coronary heart disease, heart attack, heart failure, and heart valve disease, can increase the risk of developing an arrhythmia. Factors such as being over ...