Duan Guixi(段貴新，Dept Cardiothorac Surg Affil Hosp Bengbu Med Col，Bengbu 233004)…∥Chin J Organ Transplant.－2011，32(9).－558～561

Evaluation of myocardial viability during cold storage by measurement of myocardual dielectric properties tanδm in radio frequency

Duan Guixi(段貴新，Dept Cardiothorac Surg Affil Hosp Bengbu Med Col，Bengbu 233004)…∥Chin J Organ Transplant.－2011，32(9).－558～561

ObjectiveTo study the mechanism of myocardial dielectric property changes in radio frequency during hypothermic preservation and explore myocardial viability evaluative method.MethodsHybrid young pigs(20 －30 kg)were used in the experiment.Heart arrest was induced with GIK solution.According to preservative temperature，the animals were divided into three groups:group A(4℃)，groupB(15℃)and groupC(25℃).The heart was preserved in saline for 12，6 and 4 h respectively.Myocardial dielectric properties and ATP content were tested every 5 and 30 min during hypothermic preservation respectively.The relationship beween tanδm and ATP content was analyzed.ResultsTanδm of three groups was decreased significantly at the beginning，most slightly in group A and most obviously in group C.There was no significant difference in Tanδm berween group B and group C with group A at 1 h，but there was obvious difference at 2，3 and 4 h(P ＜ 0.05，P ＜ 0.05，P ＜ 0.01.)There was correlation between tanδm and ATP in the three groups.ConclusionTanom in three groups is dropped with preservation time and temperature，and tanom had a correlation with ATP content.Detection of myocardial dielectric property in radio frequency is a kind of quick，accurate and noninvasive method 9 refs，5 figs.

(Authors)