Circulation in a particular region or organ is directly proportional to the degree of local activity. It is adjusted on two lines: (1) By regulating the general circulation, and (2) By adjusting the local blood vessels. Generally, vasodilatation of an active part is accompanied with vasoconstriction of other inactive parts. In this way, blood is shifted from the inactive to [...]
In this article we will discuss about:- 1. Anatomical Considerations of Coronary Circulation 2. Methods of Studying Coronary Circulation 3. Normal Values of Coronary Circulation 4. Ventricular Action Affects Coronary Circulation 5. Circulatory Status of the Cardiac Muscle under Certain Diseased Conditions Anatomical Considerations of Coronary Circulation: Blood supply to the heart is mainly carried out by the two coronary [...]
Introduction to Heart Sound: There are two classical sounds of heart in humans, known as the first and the second sounds (Fig. 7.56). They can be easily detected with a Stethoscope. Two other sounds have also been described - the third and the fourth - which, though difficult to detect clinically, are constantly found in graphic records. The first and [...]