Classic changes of ischemia may be described or explained as follows: 1. ST-segment elevations or depressions that are usually localized (but may be diffuse) and may be associated with such T-wave ...

Paired narrow QRS complexes, each preceded by a P wave, certainly raise the possibility of atrial bigeminy. But there are other causes of paired QRS complexes during sinus rhythm. One should look ...

Correspondence to Dr Jonathan A Drezner, Stadium Sports Medicine Center, University of Washington, Seattle, WA 98195, USA; jdrezner{at}uw.edu The most substantive change is the introduction of a ...

A doctor may refer to an electrocardiogram as an “ECG” or “EKG.” It uses electrodes to measure the electrical activity of the heart. This can help medical professionals detect heart abnormalities, ...

Apple’s new, fourth-generation watch has an electrical heart rate sensor. This can record your electrocardiogram or ECG, which Apple says: … can classify if the heart is beating in a normal pattern or ...