Related Experiment Videos
[Serial echocardiographic studies of the function of the left ventricle in acute myocardial infarct]
Insights
Serial echocardiography in myocardial infarction patients reveals worsening left ventricular function initially. Favorable outcomes show gradual improvement, while fatal cases see persistent dysfunction, highlighting the importance of cardiac insufficiency and infarct location.
Area of Science:
- Cardiology
- Medical Imaging
- Clinical Research
Background:
- Myocardial infarction (MI) significantly impacts left ventricular (LV) function.
- Serial echocardiography is crucial for monitoring cardiac recovery post-MI.
- Understanding the dynamics of LV asynergy and contractile function is vital for prognosis.
Purpose of the Study:
- To assess the serial changes in left ventricular (LV) function after primary myocardial infarction.
- To correlate echocardiographic findings with patient outcomes (fatal vs. favorable).
- To investigate the influence of cardiac insufficiency and infarct localization on LV dynamics.
Main Methods:
- Serial echocardiographic examinations were performed on 51 primary myocardial infarction patients.
- Measurements included left ventricular asynergy, end-diastolic index, and volume/pressure coefficient.
- Data were collected on days 1, 3, 5, 7, 10, 20, and before discharge, compared to 20 healthy controls.
Main Results:
- LV contractile function indices worsened early, peaking by day 3.
- Fatal outcomes correlated with progressive or static dysfunction.
- Favorable outcomes showed gradual improvement, starting with the volume/pressure coefficient.
- Asynergy zones resolved in only 5 patients by discharge.
- Significant differences observed based on cardiac insufficiency severity and infarct location.
Conclusions:
- Echocardiographic indices dynamically reflect LV function post-MI.
- Early functional decline and persistent asynergy indicate a poorer prognosis.
- LV recovery patterns vary, influenced by clinical factors like heart failure and infarct site.
Abstract:
The results of serial echocardiographic examination of 51 patients with primary myocardial infarction are discussed. Echocardiography was performed on the 1st, 3rd, 5th, 7th, 10th, and 20th days of the disease and before discharge. Thirty patients had infarct of the anterior wall and 21 of the posterior wall. The dynamics of left ventricular asynergy, end diastolic index, and volume/pressure coefficient suggested by Corya et al. were studied. The findings were compared with the indices of 20 healthy persons. The indices of regional and general contractile function of the left ventricle grew worse beginning with the first hours of the disease, the changes were most marked on the 3rd day while in cases with a fatal outcome they progressed or did not change. In cases with a fatal outcome they progressed or did not change. In cases with a favourable outcome, the indices improved gradually, first the volume/pressure coefficient and later the end diastolic index. The zones of asynergy disappeared before discharge in only 5 patients. Differences were found depending on the presence and severity of cardiac insufficiency and the localization of the myocardial infarction.