This test is used to
detect and evaluate for arrhythmias (
abnormal heart rhythms), which can be very fast or very slow and can cause fainting, weakness, or lethargy.How fast the
heart is
beating
A continuing study into the medical potential of consumer wearables has confirmed devices like Apple Watch are sensitive enough to
detect abnormal heart rhythms with a 97 percent accuracy, a performance that
beats out add - on ECG accessory KardiaBand.