Q wave is related to septal depolarization, which is from left to right. Therefore normal Q wave is not seen in the right precordial leads.
PR interval is between the start of the P wave and the start of QRS. It comprises electrical conduction from the SA node to the His bundle. It lasts 120-200 ms. According to the duration of this interval and the association of P and QRS, we will have three types of atrioventricular blocks. first degree, […]