Exercise stress testing and an electromechanical S wave of the electrocardiogram.  Does the S-wave voltage change with increasing work rate?
A new view of the electrocardiogram, first proposed by Posel and arising from Craib's travelling dipole concept, predicts an electromechanical relationship between S-wave amplitude changes and cardiac mechanical function changes.  In an attempt to determine whether the S-wave voltage changes with increasing work rate, 10 male subjects were tested at rest and at maximum exercise.  A statistically significant increase in the S wave occurred with increased mechanical work.  The theoretical prediction of an electromechanical S wave is thus validated and a request is extended to other workers to verify or refute its existence.
D004562:Electrocardiography; D005080:Exercise Test; D006321:Heart / Q000502:physiology*; D006801:Humans; D008297:Male; D005082:Physical Exertion; D012119:Respiration