Which of the Following Is the Key Advantage of Pre-Ejection

question 29

Multiple Choice

Which of the following is the key advantage of pre-ejection period (PEP) over interbeat interval (IBI) as a measure of cardiac activity?

• A) IBI can only be measured with an x-ray or similar imaging, whereas PEP can be measured with sensors placed on the skin.
• B) PEP is influenced only by emotional stress, whereas IBI can also be influenced by physical movement.
• C) PEP is only influenced by sympathetic activation, whereas IBI is influenced by both sympathetic and parasympathetic activation.
• D) Changes in PEP can be measured on a finer scale than changes in IBI.