2.3.2: Ejection fraction:
Left ventricular ejection fraction was calculated from apical four and two chamber views using biplane disc summation method (Modified Simpsons method) by tracing the endocardial border manually at end-diastole and end-systole (planimetry). Ejection fraction was calculated using the following formula:
\begin{equation} \text{EF}=\ \ \frac{EDV-ESV}{\text{EDV}}\text{\ \ }X\ \ \ 100\nonumber \\ \end{equation}
Where EDV represent left ventricular end-diastolic volume, ESV represents left ventricular end-systolic volume