Myocardial energy metabolism in asphyxiated canine hearts preserved for 24 hours.
Myocardial energy metabolism in asphyxiated cadaver hearts preserved in UW solution (UWS; group 1, n = 6) or modified Collins' solution (MCS; group 2, n = 6) was compared with that in cardioplegic arrested hearts immersed in ice-cold MCS with (group 3, n = 6) or without myoprotective drugs (group 4, n = 5). All hearts were stored for 24 hr. The hearts in groups 1 and 2 were pretreated with prostacyclin, verapamil, and propranolol; asphyxiated for 10 min, reversed by coronary perfusion with warm blood cardioplegia (WBCP); perfused with ice-cold crystalloid cardioplegia for 2 hr; excised and immersed in cold storage solution for 22 hr; and perfused again with WBCP before reperfusion. ATP contents were measured in biopsy specimens by HPLC. Myocardial ATP level decreased significantly from 23.7 +/- 1.7 to 15.9 +/- 2.5 mumol/g dry wt. (P less than 0.0001) by asphyxia, but recovered to within normal limits by WBCP in group 1. The ATP level again decreased to 15.8 +/- 2.4 mumol/g dry wt. during 24-hr storage, but finally rose to 22.4 +/- 3.5 mumol/g dry wt. by terminal WBCP. The ATP metabolism in group 2 was similar to that in group 1. The ATP content in group 4 was significantly lower than that in other groups (P less than 0.01) after 24-hr preservation. The study shows that damage to cadaver hearts can be reversed and the hearts maintained satisfactorily viable for 24 hr.
Shirakura
R
R
First Department of Surgery, Osaka University Medical School, Japan.
Matsuda
H
H
Nakano
S
S
Nakata
S
S
Kaneko
M
M
Takami
H
H
Miyagawa
S
S
Fukushima
N
N
Kitagawa
S
S
Naka
Y
Y
D000255:Adenosine Triphosphate / Q000032:analysis; D000818:Animals; D004285:Dogs; D004734:Energy Metabolism; D006085:Graft Survival; D006321:Heart; D006324:Heart Arrest, Induced / Q000009:adverse effects; D016027:Heart Transplantation / Q000276:immunology; D000860:Hypoxia / Q000503:physiopathology*; D009206:Myocardium / Q000737:chemistry / Q000378:metabolism*; D009926:Organ Preservation; D013997:Time Factors
D000255:Adenosine Triphosphate