References 1, , , et al. Comparison of left ventricular ejection fraction and volumes in heart failure by echocardiography, radionuclide ventriculography and cardiovascular magnetic resonance; are they interchangeable? Eur Heart J 2000; 21(16): 1387-1396. 2, . Beyond ejection fraction: An integrative approach for assessment of cardiac structure and function in heart failure. Eur Heart J 2016; 37(21): 1642-1650. 3, , , et al. Empagliflozin in heart failure with a preserved ejection fraction.