(BQ) Part 2 book "Comprehensive textbook of echocardiography" presents the following contents: Echocardiography/ultrasound examination and training (epiaortic ultrasonography, intracardiac echocardiography, intravascular ultrasound imaging, intravascular ultrasound imaging,.), valvular heart disease (m aortic regurgitation echocardiographic evaluation of aortic disease,.).