|Cardiac ischemia is a condition in which the blood reaching to heart muscle decreases. Coronary ischemia is a medical term for not having enough blood through the coronary arteries. This occurs when the blood flow through one or more of the blood vessels that lead to your heart (coronary arteries) is decreased. This leads to decrease in the amount of oxygen reaching heart muscle. Cardiac ischemia may occur slowly as the arteries become blocked over time, or it may occur quickly when an artery becomes blocked suddenly. Review articles are the summary of current state of understanding on a particular research topic. They analyze or discuss research previously published by scientist and academicians rather than reporting novel research results.
Review article comes in the form of systematic reviews and literature reviews and are a form of secondary literature. Systematic reviews determine an objective list of criteria, and find all previously published original research papers that meet the criteria. They then compare the results presented in these papers. Literature reviews, by contrast, provide a summary of what the authors believe are the best and most relevant prior publications.
The concept of "review article" is separate from the concept of peer-reviewed literature. It is possible for a review to be peer-reviewed, and it is possible for a review to be non-peer-reviewed.