Cardiac Physiology: Matching Concepts

This solution details the correct matching of cardiac volume and efficiency terms (List I) with their physiological definitions (List II).

Matching List I with List II

• A. End Diastolic Volume (EDV) correctly matches with III. The amount of blood in each ventricle at the end of ventricular diastole. This is the volume of blood accumulated in the ventricle after it has filled during relaxation.
• B. End-systolic Volume (ESV) correctly matches with I. The amount of blood remaining in each ventricle at the end of ventricular systole. This represents the residual volume of blood in the ventricle after contraction.
• C. Stroke Volume (SV) correctly matches with IV. The amount of blood pumped out of each ventricle during a single beat. Stroke Volume is the difference between EDV and ESV ($ SV = EDV - ESV $).
• D. Ejection Fraction (EF) correctly matches with II. The percentage of the EDV represented by the SVC. Stroke volume.. Ejection Fraction measures the percentage of blood ejected from the ventricle per beat relative to its end-diastolic volume ($ EF = \frac{SV}{EDV} \times 100\% $), indicating contractility.

Based on these definitions, the correct pairing is A-III, B-I, C-IV, D-II.