See also: List of Microsoft Visual Studio Add-ins and Visual Studio Extensibility. Visual Studio allows developers to write extensions for Visual Studio to extend its capabilities. These extensions plug into Visual Studio and extend its functionality. Extensions come in the form of macros, add-ins, and packages.
Unstable angina is part of a condition called acute coronary syndrome. Acute Coronary Syndrome. Acute coronary syndrome (ACS) is a severe and sudden heart condition that, although needing aggressive treatment, has not developed into a full blown heart attack. Acute coronary syndrome includes: Unstable Angina.
Complicated: A 'heart murmur means that one can hear blood flow with a stethoscope. Very nonspecific term. A hole in the heart is a connection between the circulation that supplies the lungs (right heart) and the circulation that supplies the body (left heart). There are various types of holes (defects). All of the holes/defects have the potential to cause a murmur.