The knee joint functions as a stabilizer for the lower extremity during weight bearing and allows large range of motion for various functional activities. The two primary articulations of the knee joint are the tibiofemoral joint and the patellofemoral joint.
1. electrocardiogram recorded between one limb and two other limbs. The augmented leads are designated aVF, aVL, and aVR for recordings made between the foot (left), left arm, and right arm, respectively, and the other two limbs. The definition information for augmented lead is provided by Stedman's.
In many cases, patients in the intensive care unit will be monitored continuously using an EKG machine. A precordial lead is one of the leads placed on the chest for an electrocardiogram. During an electrocardiogram, electrodes are placed on the skin to monitor electrical impulses inside the heart. A heart attack results in evolving changes to different precordial leads.