Final answer:
The best views for RV systolic function evaluation via echocardiogram are the apical four-chamber, subcostal, and parasternal short-axis views. These allow for proper assessment of RV ejection fraction and stroke volume, which are integral to determining heart function.
Step-by-step explanation:
The best views for evaluating RV (right ventricular) systolic function are those obtained by echocardiogram, particularly the apical four-chamber view focusing on the RV, the subcostal view, and the parasternal short-axis view at the level of the left ventricle. These views allow for the assessment of RV size, wall motion, and contractility. Ejection fraction (EF) is used as a measurement of the heart's systolic function, calculating the percentage of blood ejected from the ventricle with each heartbeat. RV EF is typically calculated by dividing the stroke volume (SV), which is the amount of blood ejected by the ventricle during systole (SV = EDV - ESV), by the end-diastolic volume (EDV), and it is normally expressed as a percentage. Normal EF range is approximately 55-70 percent. It is important to consider variables impacting SV—such as preload, afterload, and contractility—to thoroughly understand RV systolic function.