|Pharmacology which is the branch of medicine and biology deals with the study of drug action in which cardiac pharmacology is a sub branch which deals with drugs that are used in the treatment of cardiovascular disease. The content emphasizes the biophysical, biochemical, and cellular basis for drug therapy. 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.