HP ALM Synchronizer enables you to synchronize HP ALM with the VSTS.
It supports Requirement and Defect artifacts in HP ALM (VSTS).
ALM synchronizer 12.53 sync pack 2 supports ALM 11 and higher, so you should be ok on your current ALM 11.52 version
The ALM synchronizer can synchronize defects and requirements between the following endpoints and HPE ALM:
Microsoft Team Foundation Server (TFS) - includes both TFS 2015 on-premise and TFS in the cloud (certified Visual Studio Team Services)
IBM Rational ClearQuest (Defects)
IBM Rational RequisitePro (Requirements)
IBM Rational Team Concert (RTC)
you can refer the below link for more information on the integration part.
Here is the install guide as well, please reference the bottom of page 25: