What is arrhythmia?
Arrhythmia is an abnormal heart rhythm, this includes irregular heart rates and skipped (ectopic) beats.
Atrial flutter is an abnormal heart rhythm within the upper pumping chambers of the heart (left and right atria) and falls into the category of supra ventricular tachycardia (fast rhythms in the upper chambers of the heart). This rhythm may occur in individuals with or without other forms of cardiovascular disease.
During supraventricular tachycardia the heart beats more than 100 beats per minute, so fast that the heart muscle cannot relax between contractions. This inefficient contraction of the heart decreases cardiac output (blood and oxygen circulation) and may cause blood pressure to drop.