XXXX to electrolyte cardioplegia on the effectiveness of preservation of right @entity955 : mitochondrial morphometric study.

@entity1 @entity63 @entity1503 @entity955 @entity1167 @entity2332
The right atrium differs from the left ventricle in two respects during @entity1167 : a higher proportion of noncoronary collateral flow is delivered to the right atrium, and the atrium is frequently excluded from topical ice cooling because of its higher position relative to the left ventricle. These factors result in early rewarming of @entity955 . To the best of our knowledge, the surgical literature contains no reports on whether @entity1503 can provide better atrial myocardial preservation than electrolyte cardioplegia. Twenty consecutive @entity1 who underwent cardiac operations were randomly selected to receive @entity1503 (Group 1) or electrolyte cardioplegia (Group 2). @entity2332 was achieved by systemic cooling and continuous topical cooling with ice slush. Stereological morphometric study of mitochondria was performed on 40 biopsy specimens taken from the right atrium prior to aortic cross-clamping (preischemia) and at the end of @entity63 . In Group 1, total aortic cross-clamp time was 72.8 +/- 32.5 minutes. The mean mitochondrial surface area before @entity63 was 0.224 +/- 0.032 mu 2 and after @entity63 , 0.336 +/- 0.032 mu 2, a 50.0% increase in mitochondrial size. In Group 2, total aortic cross-clamp time was 69.7 +/- 30.9 minutes. The mean mitochondrial surface area before @entity63 was 0.205 +/- 0.025 mu 2 and after @entity63 , 0.439 +/- 0.111 mu 2, an average increase in mitochondrial size of 114.2%. There was no significant difference between the two groups in mitochondrial size before @entity63 . However, after @entity63 the mean mitochondrial surface areas were significantly different (p less than 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)
