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DISCUSSION 
Chairman La Faroe : Thank you very much 
Dr. Spann for the usual elegant presentation of 
ventricular dynamics in the normal and abnor- 
mal state. 
W. B. Wead, University of Louisville, Ky. : I 
was interested in your fine presentation, espe- 
cially the diastolic compliance part of your ten- 
sion curve. Did you try paired stimulation and if 
so, what were the results in comparison be- 
tween the hypertrophied and the failed heart? 
Dr. Spann : Yes, we did use sustained paired 
