|It is defined as a clinical condition which is characterized by narrowing of blood vessels due to excess contraction of muscular wall of the vessels. The medicine that causes constriction of blood vessels is known as vasoconstrictors. Generally vasoconstrictors are given to increase the blood pressure. Vasoconstriction occurs due to the high concentration of calcium in vascular smooth muscle.The top open access journals are peer reviewed scholarly journals of Journal of Vascular Medicine and Surgery. The top open access journals are freely available on the public internet domain, allowing any end users to read, download, copy, distribute, prink, search or link to the full texts of the articles. These provide high quality, meticulously reviewed and rapid publication, to cater the insistent need of scientific community.These journals are indexed with all their citations noted. The top open access journals are indexed in MEDLINE, PUBMED, SCOPUS, COPERNICUS, CAS, EBSCO and ISI.