In its classic definition, by FranÃ§ois-Louis Ganshof (1944), feudalism describes a set of reciprocal legal and military obligations among the warrior nobility revolving around the three key concepts of lords, vassals and fiefs.
The exact cause of intracardiac echogenic foci remains unclear; however, they appear to be caused by small deposits of calcium in the papillary muscle of the fetal heart.
In electrophysiology, we are using intracardiac ultrasound to help us locate structures in the heart that maybe the source of arrhythmias and to facilitate the treatments for example ablations treatments where intracardiac ultrasound helps us position the catheters in one chamber or another.e can use ultrasound in several ways; an ultrasound obtained through the body surface through the chest wall is a transthoracic echocardiogram this is what most people mean by an echocardiogram. And this is a very useful test to study the heart function, enlargement of the chambers, abnormality of the valves.