Final answer:
In general, ischemic heart disease with myocardial infarction affects the contractility of the segment involved, whereas other etiologies usually involve multiple myocardial segments in a diffuse fashion.
Step-by-step explanation:
In general, ischemic heart disease with myocardial infarction affects contractility of the segment involved whereas other etiologies usually involve multiple myocardial segments in a diffuse fashion.
Ischemic heart disease with myocardial infarction refers to a condition where there is a complete blockage of a coronary artery, resulting in a lack of blood flow and oxygen to a region of the heart. This leads to death of the cardiac muscle cells in that particular segment, which affects its contractility.
On the other hand, other etiologies, such as coronary artery disease, can cause narrowing of the blood vessels, leading to reduced blood flow and oxygen supply to multiple myocardial segments, but not complete blockage. This results in a diffuse involvement of multiple segments, rather than a specific segment.