| Name | Info | Provider | Link |
|---|---|---|---|
| Heart Surgery | free resource | MedlinePlus Health Information | https://medlineplus.gov/heartsurgery.html |
| subscription/membership/fee required | Ovid Technologies, Inc. | http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=9288521.ui | |
| subscription/membership/fee required | Silverchair Information Systems | https://academic.oup.com/ejcts/article-lookup/doi/10.1016/s1010-7940(97)00121-8 |