Stannius Ligature II

The second Stannius ligature is tied between the atria ventricle, a procedure, which results in the immediate cessation of ventricular contractions. The sinus venosus and atria continue to beat at their respective rhythms.

The following trace was recorded about an hour later when ventricular contractions resumed.

Task
You should compare the rhythm of ventricular contraction with the control trace recorded in previous experiments.

Use the play/pause button to halt the display to enable you to take your measurements more easily.