Below is a normal heart sound recorded from a 1 year old boy with no heart disease. A fast heart rate is common in children and in normal subjects following a period of physical activity: If you have difficulty identifying systole (the interval between S1 and S2) use the second hand to feel the pulse at the neck.
Definition of the noun Subtype. What does Subtype mean as a name of something? noun - plural: subtypes. A group of specific things within a larger, more general group. [computing] The data type represented by a subclass. Definition of the verb Subtype. What does Subtype mean as a doing word? verb. To categorise as a subtype. synonym: subclassify; Explanation
A sub class has an 'is a' relationship with its superclass. This means that a sub class is a special kind of its super class. When we talk in terms of objects, a sub class object can also be treated as a super class object. And hence, we can assign the reference of a sub class object to a super class variable type. However, the reverse is not true. A reference of a super class object may not be assigned to a sub class variable. The following statements illustrate this concept by creating a Student object and assigning it to a Person variable. However, when we try to assign the reference of a Person object to a Student variable, we get a compilation error.