Which term refers to rhythms originating above the ventricles?

The term that refers to rhythms originating above the ventricles is "Atrial and superventricular rhythms." This is because "superventricular" specifically indicates that the origin of the rhythm is situated above the ventricles, encompassing both atrial rhythms and junctional rhythms. Atrial rhythms originate from the atria, while junctional rhythms arise from the atrioventricular junction but still fall into the category of superventricular rhythms due to their location in relation to the ventricles.

While ventricular dysrhythmias indicate that the arrhythmia is occurring in the ventricles, and sinus arrhythmia pertains to variations in heart rate related to the breathing cycle rather than a specific rhythm type, they do not encompass the broader category of rhythms beginning above the ventricles. Junctional rhythms, although originating from the junctional area and involved in the superventricular category, do not represent the entire spectrum of rhythms found above the ventricles, making "Atrial and superventricular rhythms" the most comprehensive and accurate term in this context.