<prompt> Which of the following causes no-reflow phenomenon in acute myocardial infarction contributing to reperfusion injury?Myocyte hypercontracture:Leucocyte aggregationFree radicalsComplement activation  <response>: Factors that contribute to reperfusion injury in myocardial infarction include the following: Mitochondrial dysfunction Myocyte hypercontracture Free radicals Platelet and complement activation Leukocyte aggregation - may occlude the microvasculature and contribute to the no-reflow phenomenon. 