Final answer:
Systolic bowing of the interatrial septum towards the right atrium indicates an atrial septal defect.
Step-by-step explanation:
Systolic bowing of the interatrial septum toward the right atrium may be an indication of:
A. Atrial septal defect
B. Mitral regurgitation
C. Tricuspid regurgitation
D. Tricuspid stenosis
The correct answer is A. Atrial septal defect. In this condition, there is a hole in the atrial septum, allowing blood to flow from the left atrium to the right atrium. This causes the interatrial septum to bow towards the right atrium during systole.