Related Experiment Video
Updated: Jul 20, 2026
Cardiac Loading using Passive Left Atrial Pressurization and Passive Afterload for Graft Assessment
Published on: August 2, 2024
The Myocardial Performance Index detects chronic cardiac allograft dysfunction sooner than other methods
1Division of Cardiology and Internal Medicine, San Giovanni Battista Hospital, University of Turin Medical School, Turin, Italy.
Insights
The Myocardial Performance Index (MPI) can detect early heart graft dysfunction in transplant patients. This combined systolic and diastolic index shows promise for earlier detection compared to ejection fraction (EF).
Area of Science:
- Cardiology
- Transplantation Medicine
- Diagnostic Imaging
Background:
- Chronic heart graft dysfunction is a significant concern post-transplantation.
- Early detection of dysfunction is crucial for patient outcomes.
- Diastolic dysfunction often precedes systolic dysfunction.
Purpose of the Study:
- To investigate the clinical and prognostic value of the Doppler-derived Myocardial Performance Index (MPI).
- To assess MPI's ability to detect early systolic and diastolic dysfunction in heart transplant recipients.
- To compare MPI with ejection fraction (EF) for early graft dysfunction detection.
Main Methods:
- MPI was measured in 63 heart transplant patients (mean age 55, mean 5.3 years post-transplant) and 63 matched controls.
- Clinical examinations were performed at enrollment and 3-month follow-up.
- Patients were analyzed based on adverse events (heart failure, hospitalization, cardiac death) within 3 months.
Main Results:
- 11 patients (17.5%) experienced adverse events within 3 months.
- Higher MPI values were significantly associated with adverse events (0.55±0.19 vs 0.34±0.18, P=0.001).
- MPI (cut-off 0.47) and EF (cut-off 50%) were independent predictors of adverse events; MPI showed potential for earlier detection than EF.
Conclusions:
- The Myocardial Performance Index (MPI) is a valuable combined systolic and diastolic index.
- MPI may detect early heart graft dysfunction more effectively than ejection fraction (EF).
- MPI holds prognostic significance in heart transplant recipients.
Aim:
Many noninvasive techniques have been proposed for the early detection of chronic heart graft dysfunction. Diastolic dysfunction may precede systolic dysfunction, and often is prominent; therefore, the aim of the study was to investigate the clinical and prognostic value of a Doppler-derived index of both systolic and diastolic function in heart transplanted patients (Myocardial Performance Index, MPI).
Methods:
The MPI was measured in 63 consecutive patients (mean age 55 years, 49 men and 14 women) in sinus rhythm with an orthotopic heart transplantation for at least 1 year (mean 5.3 years) and in 63 age and sex-matched controls. A complete clinical examination was performed at the time of enrollment and was repeated after 3 months.
Results:
At 3 months, 11 patients (17.5%) presented events (heart failure, hospitalisation or cardiac death). Patients were divided into 2 groups: Group A (52 patients) without events in the follow-up and Group B (11 patients) with events. The values of MPI in Group B (0.55+/-0.19) were significantly higher than values in Group A (0.34+/-0.18, P=0.001). Whereas the values of the index did not differ significantly between Group A and control group (0.34+/-0.18 vs 0.33+/-0.10, P=NS). In the univariate analysis, the population of heart transplanted patients was dichotomised in subgroups by a cut-off MPI of 0.47 and a cut-off ejection fraction (EF) of 50%. Nine patients (41%) with MPI=or>0.47 presented events, while only 2 patients (5%) with MPI<0.47 had any event (P<0.001; c2 12.9). Six patients (85%) with EF<50% had events, while only 5 patients (9%) with EF=or>50% had an event (P<0.001; c2 14). In the multivariate analysis only MPI (chi squared=22.6, P=0.018) and EF (chi squared=20.8, P=0.025) were significant independent predictors of heart failure or cardiac death. By looking at Kaplan-Meyer curves, MPI seems to be better than EF in the earlier detection of graft dysfunction.
Conclusion:
MPI, as a combined systolic and diastolic index, may detect graft dysfunction earlier than EF.
Related Concept Videos
01:20Blood Studies for Cardiovascular System I: Cardiac Biomarkers
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
01:27Myocarditis II: Clinical Features and Diagnostic Tests