What does fibrillation refer to?

Fibrillation refers to a specific type of cardiac arrhythmia characterized by rapid and ineffective contractions of the heart muscles, particularly the atria or ventricles. In this condition, the heart does not pump blood effectively because the contractions are disorganized and uncoordinated. This can lead to severe complications such as inadequate blood flow to vital organs, which can be life-threatening if not resolved.

Normal heart contractions involve synchronized and rhythmic beats that ensure efficient blood circulation throughout the body. Complete heart stoppage indicates a full cessation of cardiac activity, while a low heart rate, or bradycardia, refers to a slower than normal heart rate but does not necessarily indicate the chaotic contractions seen in fibrillation. Therefore, the emphasis on disorganized contractions differentiates fibrillation from these other cardiac conditions.