Introduction: Scientific collaboration is a process in which two or more authors share their ideas, resources, and data to create a joint work. This research attempted to study co-authorship, being a kind of scientific collaboration, in Iranian cardiovascular articles in Web of Science during 2002-2011.

  Methods: The present research is. The population of this descriptive-analytical research study constituted Iranian cardiovascular articles indexed in WoS during 2002-2011. Indicators such as Collaboration Index (CI), Degree of Collaboration (DC) and Collaboration Coefficient (CC) were calculated to measure level of collaboration.

  Results: Articles published in cardiovascular field showed an ascending trend especially since 2002. Three-authored articles were the most and personal articles were the least frequent ones. Scholars were shown to be more interested in national collaboration based on Nationalization Index and according to collaboration indicators, scientific collaboration of cardiovascular researchers is also increasing.

  Conclusion: Year 2002 can be considered as the inception of growth in scientific activities in cardiovascular field. Considering the interdisciplinary nature of the field, the present more tendency to scientific collaboration is an advantage that can play a major role in causing drastic improvements.