A large protein found within the muscle cells that is involved in the process of contraction; presence of abundant Troponin in blood plasma is strongly Read More
Archives
U Wave
A wave that follows the T wave and precedes the P wave; its significance remains somewhat unknown, but it may be the repolarization of the Read More
Underlying Rhythm
While a rhythm as a whole may be irregular, segments may be regular. These regular periods are often referred to as the underlying rhythm. Apply Read More
Unipolar Lead
Nine leads of a 12 lead ECG are unipolar leads; the unipolar leads view the heart directly from the electrode’s vantage point; for example, V1 Read More
Vagal Maneuver
A maneuver that stimulates the Vagus nerve; possible maneuvers include a Valsalva maneuver (bearing down), ice thrust in ice water, anal stimulation, and carotid massage; Read More
Valves of the Heart
Valves act as gates ensuring unidirectional blood flow. They are located between the atria and ventricles as well as between the ventricles and the major Read More
Veins
Blood vessels that carry blood to the heart. Read More
Ventricles
The larger chambers of the heart (3 times the volume and muscle thickness than the atria), responsible for the pumping of blood to the lungs Read More
Ventricular Bigeminy
Ventricular bigeminy is named after premature ventricular complexes (PVCs) that happen every second beat. This can happen with alternating sinus or junctional complexes so it Read More
Ventricular Conduction System
The specialized bundle branches and Purkinje network facilitate rapid conductivity. The bundle branches and Purkinje network are composed of Purkinje fibers, specialized cardiac cells that Read More