With heart rate monitors now standard in smartwatches and fitness trackers, electrocardiograms (ECG/EKG) have rapidly become a common feature in health wearables. The technology aims to assist ...

A left anterior fascicular block, also known as left anterior hemiblock, occurs when the anterior fascicle of the left bundle branch is no longer able to conduct action potentials. The criteria to ...

Loren Brutsch is a writer and editor for Health.com. She has a master's in publishing, is a certified personal trainer, and has over six years of experience in strength training and bodybuilding.