we hypothesized that by inducing ventricular fibrillation ( vf ) prior to cardioplegic arrest in nonvented hypertrophied hearts of pigs , the metabolic characteristics of the epicardial and endocardial regions would be compromised compared with animals in which cardioplegic solution was infused while the hearts were in normal sinus rhythm ( nsr ) .
C0014124
endocardial
C0018787
hearts