Objective To investigate changes of apoptosis and Caspase3 activity and the left ventricular ejection function and the regional myocardial dysfunction following acute ischemia in dogs.Methods Thirty dogs were divided into experiment and control groups.Dogs in experiment group were studied at 10,30 and 60 min following left anterior descending coronary artery occlusion.Triphenyltetrazolium chlorde(TTC)staining was used to identify ischemia myocardium.The left ventricular ejection fraction and the degree of t...