Re: right bundle branch block and other stuff :)
The QRS is the large electrical signal (spike) during the heart beat shown on the graph of the EKG. Q is the measurement at the beginning, R is the peak, and S is the end. The distance between Q and S is measured and if wider than normal could indicate an enlargement.
LV hypertrophy is an enlargement of the left chamber.
RBBB is a blockage of the normal passage route of electrical signals that originate in the right atrium. Usually the electrical signal will find another pathway and bypass the blockage. May or may not cause abnormal heart beats.
An echo uses sound waves with the ability to measure heart size, etc. The tech will use a transducer the time of systole (relaxation of heart chamber) and time at dystole (max contraction). The difference and other procedures will with calculations show heart size and pumping efficiency....the color doppler as part of the echo test will show any backward (regurgitation) blood flow through the valves or any other blood flow abnormalities. A trace of mvr is usually no problem.