[Improved method of equilibrium radionuclide ventriculography]

The commonly used method of static radionuclide ventriculography with a cardiosynchronizer does not permit obtaining a curve of ventricular function over a complete cardiac cycle, especially using computers with a small memory volume. Besides, the final segment of a curve is usually insignificant as a result of variations in a duration of the R-R interval. A method of 2-stage recording of radionuclide ventriculography has been proposed, the second stage being shifted to a certain time interval, i. e. a delay line is introduced between a synchronizing device and computer. Two methods of delay--in the software and hardware--are proposed, the latter being more preferable as it makes unnecessary extra technical devices. Particular attention is drawn to a choice of delay time depending on a computer memory volume: in a small memory volume delay time must be approximately one-third of the patient's R-R interval.