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Ann Thorac Surg 1994;58:1368-1372
© 1994 The Society of Thoracic Surgeons

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Articles

Cardiac storage with UW solution and glucose

Divisions of Cardiovascular Surgery and Clinical Biochemistry, University of Toronto, Toronto, Ontario, Canada

Accepted for publication March 4, 1994.

^_* Address reprint requests to Dr Fremes, Sunnybrook Health Science Centre, 2075 Bayview Ave, H405, Toronto, ON, Canada M4N 3M5.

Previous investigations from our institution using an isolated human cardiomyocyte model concluded that glucose supplementation of University of Wisconsin solution (UWS) was beneficial with respect to adenine nucleotide and protein recovery. We wished to confirm these results using an isolated heart model. Rodent hearts were frozen in liquid nitrogen (control) or flushed and stored in UWS for 8 hours at 0 °C or UWS supplemented with 10, 20, or 30 mmol/L glucose. Experimental hearts were assessed at end-storage or after 45 minutes of reperfusion on a Langendorff apparatus. Adenine nucleotides were assessed by high performance liquid chromatography. In parallel experiments, ventricular function was assessed before and after storage in Langendorff-perfused hearts instrumented with a left ventricular balloon. Glucose supplementation was associated with greater poststorage (20 and 30 mmol/L glucose) and postreperfusion (10, 20, and 30 mmol/L glucose) adenosine triphosphate levels than unmodified UWS. Developed pressure (expressed as a percentage of control values) was increased with 10 mmol/L glucose (75.2% ± 7.9%, mean ± standard deviation) compared with unmodified UWS (64.6% ± 6.6%; p < 0.05). Coronary flow was greater with 10 (72.6% ± 10.7%) or 20 mmol/L (71.2% ± 12.5%) versus 0 mmol/L glucose (58.6% ± 12.1%, p < 0.05). The data support previous in vitro findings and suggest that the addition of 10 mmol/L glucose to UWS is associated with enhanced recovery after prolonged hypothermic storage.

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