Mr. Smith was lifting a heavy piece of furniture when he experienced crushing pain in his chest, began sweating heavily, and was nauseated. His wife drove him to the hospital, where he was diagnosed with a myocardial infarction (MI, also called a heart attack) and given intravenous drugs to dissolve a clot that was obstructing a major coronary artery. After his hospitalization, Mr. Smith's doctor told him that some of his heart muscle had died.

Explain the pathological processes associated with the term "heart muscle died."

Discuss and contrast reversible and nonreversible cell injury. As per your analysis, what type of cell injury did Mr. Smith sustain and why? Include pathophysiological processes involved with cell injury.