Myocardial Contraction Fraction Calculator
for echocardiography
Results
Stroke Volume: mL
LV Mass: g
Myocardial Volume: mL
What is MCF? Myocardial Contraction Fraction (MCF) is the ratio of stroke volume to myocardial volume. Unlike ejection fraction which divides by chamber volume, MCF measures myocardial efficiency—how much blood output is generated per unit of heart muscle.
Why use MCF? MCF can detect myocardial dysfunction even when LVEF appears normal, particularly in hypertensive heart disease, HCM, amyloidosis, and HFpEF. Studies show MCF outperforms LVEF for mortality prediction.
References
- Donal E, Craciun PC, Popescu BA. Beyond Ejection Fraction: Back to the Myocardium in the Assessment of Cardiac Function. Eur Heart J Cardiovasc Imaging. 2026 (in press).
- Jentzer JC, Wiley BM, Gersh BJ, et al. Myocardial contraction fraction by echocardiography and mortality in cardiac intensive care unit patients. Int J Cardiol. 2021;344:230-239.
- Maurer MS, Packer M. How Should Physicians Assess Myocardial Contraction?: Redefining Heart Failure With a Preserved Ejection Fraction. JACC Cardiovasc Imaging. 2020;13(3):873-878.