Sinoventricular conduction in atrial standstill.

Sinoventricular rhythm implies preserved sinus node function with conduction of impulses to the A-V junction without generalized atrial excitation. Impulse propagation in such cases is presumably via specialized internodal tracts. In this present case, synchronized but localized activation from an area of the right atrium preceded each QRS, without generalized atrial depolarization. These recordings are offered as further evidence for the clinical occurrence of sinoventricular rhythm in humans.