Final answer:
The extra abnormal heart sounds heard after S2 are S3 and S4, which can indicate different cardiac conditions depending on the context and age of the individual.
Step-by-step explanation:
The extra abnormal heart sounds heard after S2 are S3 and S4. The third heart sound, S3, is associated with the filling of the ventricles and can be normal in youth, athletes, and pregnant individuals, but it may indicate congestive heart failure in older adults. The fourth heart sound, S4, occurs when the atria contract to push blood into a stiff or hypertrophic ventricle, suggesting a failure of the left ventricle. The combination of these sounds can sometimes be referred to as S7 when both are present.