Needle electromyography, or needle EMG, is a type of electrodiagnostic test used to determine whether a patient’s muscles and nerves are working properly. Physicians order the test when a patient is experiencing numbness, tingling, pain, weakness, or muscle cramping. Typically, neurologists,...
An electrocardiogram, commonly abbreviated as EKG or ECG, is a noninvasive procedure that records electrical changes in the heart. According to the American Heart Association (AHA), an ECG sends an electrical impulse (or wave) that travels through
the heart. The wave causes the heart...
