Sustained spiral wave reentry in a 3 day old monolayer disc of cultured neonatal rat ventricular cardiomyocytes (frequency ~ 5 Hz; diameter of the preparation = 8 mm). The preparation was stained with the voltage sensitive dye di-8-ANEPPS and activity was recorded at 1,000 frames/second using a custom-made tandem lens macroscope and an Ultima-L camera system.

Provided by

Dr.Stephan Rohr, University of Bern